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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 4) *

                             Arch Capital Group Ltd.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                    Common Shares, par value $0.01 per share
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    G0450A105
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                 Mark C. Wehrly
                       Farallon Capital Management, L.L.C.
                         One Maritime Plaza, Suite 1325
                         San Francisco, California 94111
                                 (415) 421-2132
--------------------------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                               September 30, 2005
--------------------------------------------------------------------------------
             (Date of Event which Requires Filing of this Statement)


If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  that is the subject of this  Schedule  13D, and is filing this
schedule because of ss.ss.240.13d-1(e),  240.13d-1(f) or 240.13d-1(g), check the
following box. [ ]

Note:  Schedules  filed in paper format shall include a signed original and five
copies of the  schedule,  including  all exhibits.  See  ss.240.13d-7  for other
parties to whom copies are to be sent.

* The remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).

                         (Continued on following pages)
                               Page 1 of 28 Pages





                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             Farallon Capital Partners, L.P.
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on this cover page,  however,  is a beneficial  owner
                           only of the  securities  reported by it on this cover
                           page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             California
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     1,235,551 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      1,235,551 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             1,235,551 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             3.4%  [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             PN
-------------===================================================================


                               Page 2 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             Farallon Capital Institutional Partners II, L.P.
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on this cover page,  however,  is a beneficial  owner
                           only of the  securities  reported by it on this cover
                           page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             California
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     312,036 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      312,036 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             312,036 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             0.9% [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             PN
-------------===================================================================


                               Page 3 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             Farallon Capital Institutional Partners III, L.P.
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                              (a)  [   ]
                                                              (b)  [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on this cover page,  however,  is a beneficial  owner
                           only of the  securities  reported by it on this cover
                           page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             Delaware
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     264,048 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      264,048 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             264,048 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             0.7% [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             PN
-------------===================================================================


                               Page 4 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             Tinicum Partners, L.P.
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on this cover page,  however,  is a beneficial  owner
                           only of the  securities  reported by it on this cover
                           page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             New York
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     50,500 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      50,500 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             50,500 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             0.1% [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             PN
-------------===================================================================


                               Page 5 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             RR Capital Partners, L.P.
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on this cover page,  however,  is a beneficial  owner
                           only of the  securities  reported by it on this cover
                           page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             Delaware
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     28,790 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      28,790 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             28,790 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             0.1% [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             PN
-------------===================================================================


                               Page 6 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             Farallon Capital Management, L.L.C.
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on  this  cover  page,  however,   may  be  deemed  a
                           beneficial  owner only of the securities  reported by
                           it on this cover page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             Delaware
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     640,964 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      640,964 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             640,964 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             1.8% [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             IA, OO
-------------===================================================================


                               Page 7 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             Farallon Partners, L.L.C.
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on  this  cover  page,  however,   may  be  deemed  a
                           beneficial  owner only of the securities  reported by
                           it on this cover page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             Delaware
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     1,890,925 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      1,890,925 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             1,890,925 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             5.2% [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             OO
-------------===================================================================


                               Page 8 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             Chun R. Ding
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on  this  cover  page,  however,   may  be  deemed  a
                           beneficial  owner only of the securities  reported by
                           it on this cover page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             United States
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     2,531,889 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      2,531,889 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             2,531,889 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             6.9% [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             IN
-------------===================================================================


                               Page 9 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             Joseph F. Downes [See Preliminary Note]
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on  this  cover  page,  however,   may  be  deemed  a
                           beneficial  owner only of the securities  reported by
                           it on this cover page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             United States
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     -0-
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      -0-
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             -0-
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             0.0%
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             IN
-------------===================================================================


                              Page 10 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             William F. Duhamel
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on  this  cover  page,  however,   may  be  deemed  a
                           beneficial  owner only of the securities  reported by
                           it on this cover page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             United States
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     2,531,889 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      2,531,889 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             2,531,889 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             6.9% [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             IN
-------------===================================================================


                              Page 11 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             Charles E. Ellwein
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on  this  cover  page,  however,   may  be  deemed  a
                           beneficial  owner only of the securities  reported by
                           it on this cover page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             United States
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     2,531,889 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      2,531,889 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             2,531,889 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             6.9% [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             IN
-------------===================================================================


                              Page 12 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             Richard B. Fried
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on  this  cover  page,  however,   may  be  deemed  a
                           beneficial  owner only of the securities  reported by
                           it on this cover page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             United States
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     2,531,889 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      2,531,889 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             2,531,889 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             6.9% [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             IN
-------------===================================================================


                              Page 13 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             Monica R. Landry
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on  this  cover  page,  however,   may  be  deemed  a
                           beneficial  owner only of the securities  reported by
                           it on this cover page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             United States
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     2,531,889 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      2,531,889 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             2,531,889 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             6.9% [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             IN
-------------===================================================================


                              Page 14 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             William F. Mellin
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on  this  cover  page,  however,   may  be  deemed  a
                           beneficial  owner only of the securities  reported by
                           it on this cover page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             United States
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     2,531,889 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      2,531,889 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             2,531,889 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             6.9% [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             IN
-------------===================================================================


                              Page 15 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             Stephen L. Millham
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on  this  cover  page,  however,   may  be  deemed  a
                           beneficial  owner only of the securities  reported by
                           it on this cover page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             United States
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     2,531,889 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      2,531,889 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             2,531,889 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             6.9% [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             IN
-------------===================================================================


                              Page 16 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             Rajiv A. Patel
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on  this  cover  page,  however,   may  be  deemed  a
                           beneficial  owner only of the securities  reported by
                           it on this cover page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             United States
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     2,531,889 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      2,531,889 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             2,531,889 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             6.9% [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             IN
-------------===================================================================


                              Page 17 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             Derek C. Schrier
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on  this  cover  page,  however,   may  be  deemed  a
                           beneficial  owner only of the securities  reported by
                           it on this cover page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             United States
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     2,531,889 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      2,531,889 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             2,531,889 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             6.9% [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             IN
-------------===================================================================


                              Page 18 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             Thomas F. Steyer
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on  this  cover  page,  however,   may  be  deemed  a
                           beneficial  owner only of the securities  reported by
                           it on this cover page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             United States
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     2,531,889 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      2,531,889 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             2,531,889 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             6.9% [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             IN
-------------===================================================================


                              Page 19 of 28 Pages



                                       13D
===================
CUSIP No. G0450A105
===================

-------------===================================================================
             NAMES OF REPORTING PERSONS
     1       I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

             Mark C. Wehrly
-------------===================================================================
             CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
                                                               (a) [   ]
                                                               (b) [ X ]**
     2
                  **       The reporting persons making this filing beneficially
                           own an aggregate of 2,531,889 Common Shares, which is
                           6.9% of the class of securities. The reporting person
                           on  this  cover  page,  however,   may  be  deemed  a
                           beneficial  owner only of the securities  reported by
                           it on this cover page. [See Preliminary Note]
-------------===================================================================
     3       SEC USE ONLY

-------------===================================================================
             SOURCE OF FUNDS (See Instructions)
     4
             N/A
-------------===================================================================
             CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
     5       TO ITEMS 2(d) OR 2(e)
                                                                   [   ]
-------------===================================================================
             CITIZENSHIP OR PLACE OF ORGANIZATION
     6
             United States
-------------===================================================================
                                      SOLE VOTING POWER
                              7
         NUMBER OF                    -0-
                         -------------==========================================
          SHARES                      SHARED VOTING POWER
       BENEFICIALLY           8
         OWNED BY                     2,531,889 [See Preliminary Note]
                         -------------==========================================
           EACH                       SOLE DISPOSITIVE POWER
                              9
         REPORTING                    -0-
        PERSON WITH      -------------==========================================
                                      SHARED DISPOSITIVE POWER
                              10
                                      2,531,889 [See Preliminary Note]
-------------===================================================================
             AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11
             2,531,889 [See Preliminary Note]
-------------===================================================================
             CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     12      CERTAIN SHARES (See Instructions)
                                                                   [   ]
-------------===================================================================
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     13
             6.9% [See Preliminary Note]
-------------===================================================================
             TYPE OF REPORTING PERSON (See Instructions)
     14
             IN
-------------===================================================================

                              Page 20 of 28 Pages



     This Amendment No. 4 to Schedule 13D (this "Amendment") amends the Schedule
13D  initially  filed on  April  12,  2002  (collectively,  with all  amendments
thereto, the "Schedule 13D").
     Preliminary Note: The Reporting Persons are filing this Schedule 13D with
respect to the Common Shares,  par value $0.01 per share (the "Common  Shares"),
of Arch Capital Group Ltd.  (the  "Company").  Certain of the Reporting  Persons
own, in aggregate,  (i)  1,115,688  Common  Shares and (ii)  1,416,201  Series A
Convertible Preference Shares (the "Preference A Shares") issued by the Company,
each  Preference A Share  immediately  convertible  into one Common  Share.  All
numbers and percentages  contained in this Schedule 13D represent  Common Shares
and not Preference A Shares (unless stated otherwise). For information regarding
the Preference A Shares, see the Company's Prospectus  Supplement dated April 3,
2002 and the Schedule 13D filed by the Reporting Persons on April 12, 2002.
     Joseph F. Downes  resigned as a managing  member of the Management  Company
and the Farallon General Partner effective September 30, 2005. This amendment to
the  Schedule  13D reports  that Mr.  Downes is no longer the deemed  beneficial
owner of any of the Common Shares reported herein.

 Item 2. Identity And Background
-------- -----------------------

         Item 2 of the  Schedule  13D is amended and restated in its entirety as
follows:

         (a)      This  statement is filed by the  entities  and persons  listed
below, all of whom together are referred to herein as the "Reporting Persons."

         The Farallon Funds
         ------------------

                  (i)      Farallon Capital Partners, L.P., a California limited
                           partnership  ("FCP"),  with  respect  to  the  Common
                           Shares   beneficially   owned  by  it  (through   its
                           ownership of Common Shares and Preference A Shares);

                  (ii)     Farallon Capital  Institutional  Partners II, L.P., a
                           California  limited  partnership  ("FCIP  II"),  with
                           respect to the Common Shares beneficially


                              Page 21 of 28 Pages



                           owned by it (through its  ownership of Common  Shares
                           and Preference A Shares);

                  (iii)    Farallon Capital Institutional  Partners III, L.P., a
                           Delaware  limited   partnership  ("FCIP  III"),  with
                           respect to the Common Shares beneficially owned by it
                           (through   its   ownership   of  Common   Shares  and
                           Preference A Shares);

                  (iv)     Tinicum   Partners,   L.P.,   a  New   York   limited
                           partnership  ("Tinicum"),  with respect to the Common
                           Shares   beneficially   owned  by  it  (through   its
                           ownership of Common Shares and  Preference A Shares);
                           and

                  (v)      RR  Capital   Partners,   L.P.,  a  Delaware  limited
                           partnership ("RR"), with respect to the Common Shares
                           beneficially  owned by it (through  its  ownership of
                           Common Shares and Preference A Shares).

         FCP, FCIP II, FCIP III, Tinicum and RR are together  referred to herein
as the "Farallon Funds."

         The Management Company
         ----------------------

                  (vi)     Farallon  Capital  Management,   L.L.C.,  a  Delaware
                           limited liability company (the "Management Company"),
                           with respect to the Common Shares  beneficially owned
                           by certain accounts managed by the Management Company
                           (the "Managed  Accounts") (through their ownership of
                           Common Shares and Preference A Shares).

         The Farallon General Partner
         ----------------------------

                  (vii)    Farallon   Partners,   L.L.C.,   a  Delaware  limited
                           liability  company  which is the  general  partner of
                           each of the  Farallon  Funds (the  "Farallon  General
                           Partner"),   with   respect  to  the  Common   Shares
                           beneficially  owned  by  each of the  Farallon  Funds
                           (through   its   ownership   of  Common   Shares  and
                           Preference A Shares).

         The Farallon Managing Members
         -----------------------------

                  (viii)   The  following  persons  who  are  (or,  solely  with
                           respect to Joseph F. Downes,  were) managing  members
                           of  both  the  Farallon   General   Partner  and  the
                           Management Company, with respect to the Common Shares
                           beneficially  owned  by the  Farallon  Funds  and the
                           Managed  Accounts:  Chun R. Ding ("Ding"),  Joseph F.
                           Downes  ("Downes"),  William F. Duhamel  ("Duhamel"),
                           Charles  E.  Ellwein  ("Ellwein"),  Richard  B. Fried
                           ("Fried"),  Monica R. Landry  ("Landry"),  William F.
                           Mellin  ("Mellin"),  Stephen L. Millham  ("Millham"),
                           Rajiv  A.   Patel   ("Patel"),   Derek   C.   Schrier
                           ("Schrier"),  Thomas F. Steyer ("Steyer") and Mark C.
                           Wehrly ("Wehrly").



                              Page 22 of 28 Pages



     Ding, Downes,  Duhamel,  Ellwein,  Fried, Landry, Mellin,  Millham,  Patel,
Schrier,  Steyer and Wehrly are  together  referred  to herein as the  "Farallon
Individual Reporting Persons."
         (b)      The address of the principal  business and principal office of
(i) the Farallon Funds, the Farallon General Partner and the Management  Company
is One Maritime Plaza, Suite 1325, San Francisco, California 94111 and (ii) each
of the Farallon Individual Reporting Persons is set forth in Annex 1 hereto.
         (c)      The principal  business of each of the Farallon  Funds is that
of a private  investment  fund engaging in the purchase and sale of  investments
for its own account.  The principal  business of the Farallon General Partner is
to act as the general partner of the Farallon Funds.  The principal  business of
the Management Company is that of a registered investment adviser. The principal
business of each of the Farallon  Individual  Reporting  Persons is set forth in
Annex 1 hereto.
         (d)      None  of the  Farallon  Funds,  the  Management  Company,  the
Farallon  General Partner or any of the Farallon  Individual  Reporting  Persons
has,  during  the last five  years,  been  convicted  in a  criminal  proceeding
(excluding traffic violations or similar misdemeanors).
         (e)      None  of the  Farallon  Funds,  the  Management  Company,  the
Farallon  General Partner or any of the Farallon  Individual  Reporting  Persons
has, during the last five years,  been party to a civil proceeding of a judicial
or  administrative  body  of  competent  jurisdiction  and as a  result  of such
proceeding  was or is subject to a  judgment,  decree or final  order  enjoining
future violations of, or prohibiting or mandating activities subject to, federal
or state securities laws or finding any violation with respect to such laws.


                              Page 23 of 28 Pages



         (f)      The  citizenship of each of the Farallon  Funds,  the Farallon
General  Partner  and the  Management  Company is set forth  above.  Each of the
Farallon  Individual  Reporting  Persons is a citizen of the United States.
         The other  information  required by Item 2 relating to the identity and
background of the Reporting Persons is set forth in Annex 1 hereto.

Item 5.  Interest In Securities Of The Issuer.
-------  ------------------------------------

         Item 5 of the  Schedule  13D is amended and restated in its entirety as
follows:

         (a)      The Farallon Funds
                  ------------------

                  (a),(b)  The information set forth in Rows 7 through 13 of the
                           cover  page   hereto  for  each   Farallon   Fund  is
                           incorporated   herein  by  reference  for  each  such
                           Farallon Fund. The percentage amount set forth in Row
                           13 for all cover pages filed  herewith is  calculated
                           based  upon  the  sum of (i)  the  35,274,505  Common
                           Shares outstanding as of July 28, 2005 as reported by
                           the Company in its Form 10-Q for the quarterly period
                           ended June 30,  2005 filed  with the  Securities  and
                           Exchange  Commission  on August 3, 2005 and (ii) with
                           respect  to each  Reporting  Person,  the  number  of
                           additional  Common  Shares such  Reporting  Person is
                           deemed to  beneficially  own through  its  beneficial
                           ownership of Preference A Shares.

                  (c)      No  transactions  in  the  Common  Shares  have  been
                           consummated in the past 60 days.

                  (d)      The Farallon  General Partner has the power to direct
                           the  receipt  of   dividends   relating  to,  or  the
                           disposition  of the  proceeds  of the sale of, all of
                           the Common Shares and Preference A Shares held by the
                           Farallon  Funds  as  reported  herein.  The  Farallon
                           Individual  Reporting  Persons  other than Downes are
                           managing members of the Farallon General Partner.

                  (e)      Not applicable.

         (b)      The Management Company
                  ----------------------

                  (a),(b)  The information set forth in Rows 7 through 13 of the
                           cover  page  hereto  for the  Management  Company  is
                           incorporated herein by reference.

                  (c)      No  transactions  in  the  Common  Shares  have  been
                           consummated in the past 60 days.


                              Page 24 of 28 Pages



                  (d)      The  Management  Company  has the power to direct the
                           receipt of dividends  relating to, or the disposition
                           of the  proceeds  of the sale of,  all of the  Common
                           Shares and  Preference  A Shares  held by the Managed
                           Accounts as reported herein. The Farallon  Individual
                           Reporting  Persons  other than  Downes  are  managing
                           members of the Management Company.

                  (e)      Not applicable.

         (c)      The Farallon General Partner
                  ----------------------------

                  (a),(b)  The information set forth in Rows 7 through 13 of the
                           cover page hereto for the Farallon General Partner is
                           incorporated herein by reference.

                  (c)      None.

                  (d)      The Farallon  General Partner has the power to direct
                           the  receipt  of   dividends   relating  to,  or  the
                           disposition  of the  proceeds  of the sale of, all of
                           the Common Shares and Preference A Shares held by the
                           Farallon  Funds  as  reported  herein.  The  Farallon
                           Individual  Reporting  Persons  other than Downes are
                           managing members of the Farallon General Partner.

                  (e)      Not applicable.

         (d)      The Farallon Individual Reporting Persons
                  -----------------------------------------

                  (a),(b)  The information set forth in Rows 7 through 13 of the
                           cover  page  hereto  for  each  Farallon   Individual
                           Reporting Person is incorporated  herein by reference
                           for each such Farallon Individual Reporting Person.

                  (c)      None.

                  (d)      The Farallon  General Partner has the power to direct
                           the  receipt  of   dividends   relating  to,  or  the
                           disposition  of the  proceeds  of the sale of, all of
                           the Common Shares and Preference A Shares held by the
                           Farallon  Funds as reported  herein.  The  Management
                           Company  has the  power  to  direct  the  receipt  of
                           dividends  relating  to,  or the  disposition  of the
                           proceeds of the sale of, all of the Common Shares and
                           Preference  A Shares held by the Managed  Accounts as
                           reported herein.  The Farallon  Individual  Reporting
                           Persons  other than  Downes are  managing  members of
                           both the Farallon  General Partner and the Management
                           Company.

                  (e)      As of  September  30,  2005,  Joseph F. Downes may no
                           longer  be  deemed  to be a  beneficial  owner of the
                           Common Shares.

         The Common  Shares  reported  hereby for the  Farallon  Funds are owned
directly by the Farallon Funds and those  reported by the Management  Company on
behalf of the Managed


                              Page 25 of 28 Pages



Accounts are owned directly by the Managed Accounts.  The Preference A Shares in
respect of which the Farallon Funds and the Managed Accounts (as reported by the
Management  Company)  are deemed to  beneficially  own  Common  Shares are owned
directly by the Farallon Funds and the Managed  Accounts.  The Farallon  General
Partner,  as general  partner  to the  Farallon  Funds,  may be deemed to be the
beneficial  owner of all such Common Shares  beneficially  owned by the Farallon
Funds. The Management  Company,  as investment  adviser to the Managed Accounts,
may be deemed to be the beneficial owner of all such Common Shares  beneficially
owned by the Managed Accounts.  The Farallon Individual  Reporting Persons other
than Downes,  as managing  members of both the Farallon  General Partner and the
Management  Company,  may each be deemed to be the beneficial  owner of all such
Common Shares beneficially owned by the Farallon Funds and the Managed Accounts.
Each of the Management  Company,  the Farallon  General Partner and the Farallon
Individual  Reporting  Persons hereby disclaims any beneficial  ownership of any
such Common Shares.


                              Page 26 of 28 Pages



                                   SIGNATURES
                                   ----------

         After reasonable inquiry and to the best of our knowledge and belief, I
certify that the information set forth in this
statement is true, complete and correct.

Dated:  October 3, 2005

                        /s/ Monica R. Landry
                     ----------------------------------------
                     FARALLON PARTNERS, L.L.C.,
                     On its own behalf and as the General Partner of
                     FARALLON CAPITAL PARTNERS, L.P.,
                     FARALLON CAPITAL INSTITUTIONAL PARTNERS II, L.P.,
                     FARALLON CAPITAL INSTITUTIONAL PARTNERS III, L.P.,
                     TINICUM PARTNERS, L.P.,
                     and RR CAPITAL PARTNERS, L.P.,
                     By Monica R. Landry,
                     Managing Member


                        /s/ Monica R. Landry
                     ----------------------------------------
                     FARALLON CAPITAL MANAGEMENT, L.L.C.,
                     By Monica R. Landry,
                     Managing Member


                        /s/ Monica R. Landry
                     ----------------------------------------
                     Monica R. Landry, individually and as attorney-in-fact for
                     each of Chun R. Ding, Joseph F. Downes, William F. Duhamel,
                     Charles E. Ellwein, Richard B. Fried, William F. Mellin,
                     Stephen L. Millham, Rajiv A. Patel, Derek C. Schrier,
                     Thomas F. Steyer and Mark C. Wehrly.

         The  Powers of  Attorney,  each  executed  by Downes,  Duhamel,  Fried,
Mellin,  Millham,  Steyer  and Wehrly  authorizing  Landry to sign and file this
Schedule 13D on each person's  behalf,  which were filed with Amendment No. 2 to
the Schedule 13D filed with the Securities  and Exchange  Commission on July 16,
2003,  by such  Reporting  Persons with respect to the Common Stock of New World
Restaurant  Group,  Inc., are hereby  incorporated  by reference.  The Powers of
Attorney  executed  by each of Ding and Schrier  authorizing  Landry to sign and
file this  Schedule 13D on his behalf,  which was filed with  Amendment No. 1 to
the Schedule 13D filed with the  Securities  and Exchange  Commission on July 2,
2003,  by such  Reporting  Person  with  respect  to the  Common  Stock of Salix
Pharmaceuticals,  Ltd.,  is hereby  incorporated  by  reference.  The  Powers of
Attorney  executed by each of Ellwein and Patel  authorizing  Landry to sign and
file this  Schedule 13D on his behalf,  which was filed with  Amendment No. 4 to
the Schedule 13G filed with the Securities and Exchange Commission on


                               Page 27 of 28 Pages



January 8, 2004 by such  Reporting  Person with  respect to the Common  Stock of
Catalytica Energy Systems, Inc., is hereby incorporated by reference.




















                               Page 28 of 28 Pages