**SECOND      AMENDMENT TO CREDIT AGREEMENT**

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*NON      CONVENIENS*

**THE      CREDIT AGREEMENT, AS AMENDED BY THIS AGREEMENT, AND THE OTHER LOAN DOCUMENTS      REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED      BY      EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE      PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE      PARTIES.**

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|   |  BOIS              D'ARC ENERGY, INC.                     |
|--------|----------------------------------------------------------------|
|   |                                                           |
|   |                                                           |
|   |  By:                   /s/ ROLAND O. BURNS |
|   | Name:                 Roland O. Burns                     |
|   | Title:                 Senior Vice President              |

|   |  THE              BANK OF NOVA SCOTIA, as              |
|--------|-------------------------------------------------------------|
|   | Administrative              Agent, Lead Arranger and Lender |
|   |                                                        |
|   |                                                        |
|   |  By:                   /s/ NADINE BELL  |
|   | Name:                 Nadine Bell                      |
|   | Title:                 Senior Manager                  |

|   |  CALYON              NEW YORK BRANCH, as               |
|--------|-------------------------------------------------------------|
|   |  Syndication              Agent and Lender             |
|   |                                                        |
|   |                                                        |
|   |  By:                   /s/ TOM BYARGEON |
|   | Name:                 Tom Byargeon                     |
|   | Title:                 Managing Director               |

|   |  AMSOUTH              BANK, as                         |
|--------|-------------------------------------------------------------|
|   |  Documentation              Agent and Lender           |
|   |                                                        |
|   |                                                        |
|   |  By:                   /s/ W. A. PHILIP |
|   | Name:                 W. A. Philip                     |
|   | Title:                 Vice President                  |

|   |  NATEXIS              BANQUES POPULAIRES, as Lender            |
|--------|---------------------------------------------------------------------|
|   |                                                                |
|   |                                                                |
|   |  By:                   /s/ DONOVAN C. BROUSSARD |
|   | Name:                 Donovan C. Broussard                     |
|   | Title:                 Vice President and Group Manager        |
|   |                                                                |

|   |  By:                   /s/ TIMOTHY L. POLVADO |
|--------|-------------------------------------------------------------------|
|   | Name:                 Timothy L. Polvado                     |
|   | Title:                 Vice President and Group Manager      |

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|   |  UNION              BANK OF CALIFORNIA, N.A., as Lender |
|--------|--------------------------------------------------------------|
|   |                                                         |
|   |                                                         |
|   |  By:                   /s/ SEAN MURPHY   |
|   | Name:                 Sean Murphy                       |
|   | Title:                 Vice President                   |
|   |                                                         |

|   |  BMO              Capital Markets Financing, Inc., f/k/a Lender |
|--------|----------------------------------------------------------------------|
|   |  Harris              Nesbitt Financing, Inc., as Lender         |
|   |                                                                 |
|   |                                                                 |
|   |  By:                   /s/ MARY LOU ALLEN        |
|   | Name:                 Mary Lou Allen                            |
|   | Title:                 Vice President                           |
|   |                                                                 |

|   |  BANK              OF AMERICA, N.A., as Lender                |
|--------|--------------------------------------------------------------------|
|   |                                                               |
|   |                                                               |
|   |  By:                   /s/ JEFFREY H. RATHKAMP |
|   | Name:                 Jeffrey H. Rathkamp                     |
|   | Title:                 Director                               |
|   |                                                               |

|   |  COMERICA              BANK, as Lender                    |
|--------|----------------------------------------------------------------|
|   |                                                           |
|   |                                                           |
|   |  By:                   /s/ PETER L. SEFZIK |
|   | Name:                 Peter L. Sefzik                     |
|   | Title:                 Vice President                     |
|   |                                                           |

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**ACKNOWLEDGMENT      BY GUARANTORS**

|   |  BOIS              D'ARC OIL & GAS COMPANY LLC,                |
|--------|-------------------------------------------------------------------------|
|   |  as              Guarantor                                         |
|   |                                                                    |
|   |                                                                    |
|   |  By:                   /s/ ROLAND O. BURNS          |
|   | Name:                 Roland O. Burns                              |
|   |     Title:               Senior Vice President |
|   | Date:  October                31, 2006                        |

|   |  BOIS              D'ARC HOLDINGS, LLC, as Guarantor               |
|--------|-------------------------------------------------------------------------|
|   |                                                                    |
|   |                                                                    |
|   |  By:                   /s/ ROLAND O. BURNS          |
|   | Name:                 Roland O. Burns                              |
|   |     Title:               Senior Vice President |
|   | Date:  October                31, 2006                        |

|   | BOIS                D'ARC OFFSHORE LTD., as Guarantor |
|--------|-------------------------------------------------------|
|   |                                                  |
|   |                                                  |
|   | By: /s/                ROLAND O. BURNS      |
|   | Name: Roland                O. Burns             |
|   | Title: Senior                Vice President      |
|   | Date: October                31, 2006            |

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|   | BOIS                D'ARC PROPERTIES, LP, as Guarantor |
|--------|--------------------------------------------------------|
|   |                                                   |
|   |                                                   |
|   | By: /s/                ROLAND O. BURNS       |
|   | Name: Roland                O. Burns              |
|   | Title: Senior                Vice President       |
|   | Date: October                31, 2006             |

|   | BOIS                D'ARC ENERGY, INC., as Guarantor |
|--------|------------------------------------------------------|
|   |                                                 |
|   |                                                 |
|   | By: /s/                ROLAND O. BURNS     |
|   | Name: Roland                O. Burns            |
|   | Title: Senior                Vice President     |
|   | Date: October                31, 2006           |