**CORRECTED**

**ASSIGNMENT      OF OVERRIDING ROYALTY INTERESTS**

**Nathan      Oil Partners LP**
**3.166665%**
**1.500000%**

**Richard      N. Jeffs**

| a) | The                Royalty is subject only to the deduction of the same expenses that                can be                deducted from royalty paid under the Leases and is subject to payment                of                the same expenses required to be paid by any person receiving payment                of                royalty under the terms of the A and                B Leases. |
|----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| b) | Assignee                has no right to pool the Royalty. Assignor or its successor retains                the                right to pool the Royalty pursuant to the pooling authority granted                to                Assignor under the terms of the A and                B Leases. |
|----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| **Witness:** | **Nathan                Oil Partners LP**            |
|--------------|------------------------------------------------------|
|         |                                                 |
|         |                                                 |
|         | /s/                Richard N. Jeffs                  |
|         | By:                Richard N. Jeffs, President of    |
|         | Nathan                Oil Operating Co. LLC, General |
|         | Partner                of Nathan Oil Partners LP     |

|                            |   |
|---------------------------------|--------|
|                            |   |
| /s/                Wendy M. Lee |   |
|                                 |   |
| Notary                Public    |        |
|                            |        |
|                            |        |

----

**Exhibit      A**

**Leases      Subject to**

**Corrected**

**Assignment      of Overriding Royalty Interests**

**As      of September 16, 2002**

**Edwards      County, Texas**

|     |                                     |                                  | Recorded                in the Official Public Recordsof                Edwards County, Texas |
|----------|------------------------------------------|---------------------------------------|-----------------------------------------------------------------------------------------------|
| Date     | Lessor                                   | Lessee                                | File                Number                                                                    | Volume | Pages |
| 2/1/2002 | The                Allar Company et al.  | Nathan                Oil Partners LP | 020838                                                                                        | 202 | 452-459 |
| 2/4/2002 | Anita                V. Driver           | Nathan                Oil Partners LP | 020839                                                                                        | 202 | 461-464 |
| 2/8/2002 | Pam                Rhoades Davis         | Nathan                Oil Partners LP | 020840                                                                                        | 202 | 466-469 |
| 2/8/2002 | Richard                Nichols           | Nathan                Oil Partners LP | 020841                                                                                        | 202 | 471-474 |
| 2/8/2002 | Eddie                Thomas              | Nathan                Oil Partners LP | 020842                                                                                        | 202 | 476-479 |
| 2/8/2002 | Candice                Baggett           | Nathan                Oil Partners LP | 020843                                                                                        | 202 | 481-484 |
| 2/6/2002 | Dale                Roberts Rhoades, Jr. | Nathan                Oil Partners LP | 020844                                                                                        | 202 | 486-489 |
| 2/6/2002 | Margie                L. Rhoades         | Nathan                Oil Partners LP | 020845                                                                                        | 202 | 491-494 |

----

**Exhibit      B**

**Leases      Subject to**

**Corrected**

**Assignment      of Overriding Royalty Interests**

**As      of September 16, 2002**

**Edwards      County, Texas**

|     |                                    |                                  | Recorded                in the Official Public Recordsof                Edwards County, Texas |
|----------|-----------------------------------------|---------------------------------------|-----------------------------------------------------------------------------------------------|
| Date     | Lessor                                  | Lessee                                | File                Number                                                                    | Volume | Pages |
| 2/1/2002 | The                Allar Company et al. | Nathan                Oil Partners LP | 020837                                                                                        | 202 | 443-450 |
|     |                                    |                                  |                                                                                          |   |   |
|     |                                    |                                  |                                                                                          |   |   |

----