----

| Makers:                                                                                                                                     |   |   | Lender:                                                                                         |   |
|------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|--------|-------------------------------------------------------------------------------------------------|--------|
|                                                                                                                                                       |   |   |                                                                                            |   |
|  Pegasi Energy Resources Corporation,    a Nevada corporation f/n/a    Maple Mountain Explorations Inc.  |   |   | Teton, Ltd., a Texas limited partnershipBy:Notet Corp., a Texas corporation,its general partner |   |
|                                                                                                                                                       |   |   |                                                                                            |   |
| By:                                                                                                                                                        |   |   | By:                                                                                             |   |
| Richard Lindermanis, Senior Vice President                                                                                                                 |   |   | W.L. Sudderth, Secretary                                                                        |   |
|  and CFO                                                                                                                                              |   |   |                                                                                            |   |

| Pegasi Energy Resources Corporation,a Texas corporation (and wholly-ownedsubsidiary of Pegasi Energy Resources Corporation,a Nevada corporation f/n/a Maple Mountain Explorations Inc.) |   |   |   |   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|--------|--------|--------|
|                                                                                                                                                                                    |   |   |   |   |
|                                                                                                                                                                                    |   |   |   |   |
| By:                                                                                                                                                                                     |   |   |   |   |
| Richard Lindermanis, Vice President                                                                                                                                                     |   |   |   |   |
|                                                                                                                                                                                    |   |   |   |   |

|                                                                                                                               |   |   |   |   |
|------------------------------------------------------------------------------------------------------------------------------------|--------|--------|--------|--------|
| Pegasi Operating Inc., a Texas corporation (and wholly-ownedsubsidiary of Pegasi Energy Resources Corporation,a Texas corporation) |   |   |   |   |
|                                                                                                                               |   |   |   |   |
| By:                                                                                                                                |   |   |   |   |
| Richard Lindermanis, Vice President                                                                                                |   |   |   |   |
|                                                                                                                               |   |   |   |   |

| TR Rodessa, Inc., a Texas corporation (and wholly-ownedsubsidiary of Pegasi Energy Resources Corporation,a Texas corporation) |   |   |   |   |
|-------------------------------------------------------------------------------------------------------------------------------|--------|--------|--------|--------|
|                                                                                                                          |   |   |   |   |
|                                                                                                                          |   |   |   |   |
| By:                                                                                                                           |   |   |   |   |
| Richard Lindermanis, Vice President                                                                                           |   |   |   |   |
|                                                                                                                          |   |   |   |   |

| 59 Disposal, Inc., a Texas corporation (and wholly-ownedsubsidiary of Pegasi Energy Resources Corporation,a Texas corporation) |   |   |   |   |
|--------------------------------------------------------------------------------------------------------------------------------|--------|--------|--------|--------|
|                                                                                                                           |   |   |   |   |
|                                                                                                                           |   |   |   |   |
| By:                                                                                                                            |   |   |   |   |
| Richard Lindermanis, Vice President                                                                                            |   |   |   |   |
|                                                                                                                           |   |   |   |   |