| 632681 | Feb 28, 2007 | Feb 28, 2007 | Houston Exploration Company, The | De Los Santos Gas Unit 1 #1050535805 | 14,700 |
| 634049 | Feb 27, 2007 | Feb 27, 2007 | El Paso E&P Zapata, L.P. | Haynes "A" #450535826 | 19,000 |
| 633992 | Feb 27, 2007 | Feb 27, 2007 | Chevron U. S. A. Inc. | Martin, J. C. #1650535824 | 11,500 |
| 633894 | Feb 26, 2007 | Feb 26, 2007 | Chesapeake Operating, Inc. | Vasquez, Romeo J. #950535823 | 14,000 |
| 633818 | Feb 23, 2007 | Feb 23, 2007 | Conocophillips Company | Bruni Ranch #5850534063 | 11,700 |
| 633815 | Feb 23, 2007 | Feb 23, 2007 | El Paso E&P Zapata, L.P. | El Clareno #750535822 | 20,000 |
| 633776 | Feb 23, 2007 | Feb 23, 2007 | Conocophillips Company | Jennings Ranch D #3050535821 | 12,700 |
| 633768 | Feb 23, 2007 | Feb 23, 2007 | Conocophillips Company | Jennings Ranch D #3150535820 | 13,150 |
| 633688 | Feb 22, 2007 | Feb 22, 2007 | Chesapeake Operating, Inc. | Volpe #450535819 | 15,000 |
| 633595 | Feb 20, 2007 | Feb 20, 2007 | Houston Exploration Company, The | Bustamante Gas Unit 1 #1650535817 | 14,800 |
| 633589 | Feb 20, 2007 | Feb 20, 2007 | Houston Exploration Company, The | Bustamante Gas Unit 1 #1550535816 | 15,000 |
| 633586 | Feb 20, 2007 | Feb 20, 2007 | Houston Exploration Company, The | Bustamante Gas Unit 1 #1350535815 | 14,760 |
| 632248 | Feb 16, 2007 | Feb 16, 2007 | Chesapeake Operating, Inc. | Zapata Townsite Unit #450535791 | 14,000 |
| 633218 | Feb 10, 2007 | Feb 10, 2007 | Chevron U. S. A. Inc. | Marshall, S. G. #3150535810 | 12,040 |
| 633212 | Feb 10, 2007 | Feb 10, 2007 | Laredo Energy IV, L.P. | Garza #150535809 | 15,000 |
| 632964 | Feb 7, 2007 | Feb 7, 2007 | Chesapeake Operating, Inc. | Vasquez-Uribe "a" Gas Unit #350533645 | 9,000 |
| 632954 | Feb 6, 2007 | Feb 6, 2007 | Paloma Resources, LLC | Gonzales #150535807 | 13,000 |
| 632852 | Feb 5, 2007 | Feb 5, 2007 | Chesapeake Operating, Inc. | Alexander "A" #350535806 | 12,000 |
| 632852Amendment | Feb 5, 2007 | Feb 5, 2007 | Chesapeake Operating, Inc. | Alexander "A" #350535806 | 15,000 |
| 632729 | Feb 2, 2007 | Feb 2, 2007 | Conocophillips Company | Las Palomas #550535505 | 14,600 |
| 632729Amendment | Feb 2, 2007 | Feb 2, 2007 | Conocophillips Company | Las Palomas #550535505 | 14,600 |
| 632651 | Jan 31, 2007 | Jan 31, 2007 | United Resources LP | Sergio, Jr. #150535804 | 11,500 |
| 632612 | Jan 30, 2007 | Jan 30, 2007 | Houston Exploration Company, The | De Los Santos Gas Unit 1 #850535803 | 14,700 |
| 632605 | Jan 30, 2007 | Jan 30, 2007 | Ricochet Energy, Inc. | Worley Gas Unit #150535802 | 10,000 |
| 632577 | Jan 30, 2007 | Jan 30, 2007 | Conocophillips Company | Mendoza, E. G. GU #450535801 | 10,900 |
| 632577Amendment | Jan 30, 2007 | Jan 30, 2007 | Conocophillips Company | Mendoza, E. G. GU #450535801 | 10,900 |
| 632554 | Jan 29, 2007 | Jan 29, 2007 | Conocophillips Company | Serafin #750535800 | 13,100 |
| 632518 | Jan 29, 2007 | Jan 29, 2007 | Pogo Producing Company | MM Talbert Estate #350535799 | 11,300 |
| 632517 | Jan 29, 2007 | Jan 29, 2007 | Pogo Producing Company | Benavides Trust #1450535798 | 11,800 |
| 632516 | Jan 29, 2007 | Jan 29, 2007 | Pogo Producing Company | Sanchez-McMurrey #2950535797 | 11,300 |
| 632489 | Jan 26, 2007 | Jan 26, 2007 | Houston Exploration Company, The | Yzaguirre-Leo Gas Unit #1550535796 | 12,000 |
| 629532 | Jan 26, 2007 | Jan 26, 2007 | Pogo Producing Company | Pogo-Ncoc Mineral Fee #150535759 | 10,500 |
| 632322 | Jan 24, 2007 | Jan 24, 2007 | Legend Natural Gas II, LP | Whittier #550535795 | 15,000 |
| 632318 | Jan 24, 2007 | Jan 24, 2007 | Legend Natural Gas II, LP | Whittier #350535794 | 15,000 |
| 632267 | Jan 24, 2007 | Jan 24, 2007 | El Paso E&P Zapata, L.P. | Haynes "A" #350535792 | 17,000 |
| 632255 | Jan 24, 2007 | Jan 24, 2007 | El Paso E&P Zapata, L.P. | Zachry #450535793 | 12,000 |
| 632214 | Jan 24, 2007 | Jan 24, 2007 | Chesapeake Operating, Inc. | Haynes #2150534086 | 12,500 |
| 632211 | Jan 23, 2007 | Jan 23, 2007 | EOG Resources, Inc. | Slator Ranch #V 450535790 | 12,750 |
| 632095 | Jan 23, 2007 | Jan 23, 2007 | EOG Resources, Inc. | Barrocito, B. M. #650535788 | 13,000 |
| 632095Amendment | Jan 23, 2007 | Jan 23, 2007 | EOG Resources, Inc. | Barrocito, B. M. #650535788 | 13,000 |
| 632110 | Jan 22, 2007 | Jan 22, 2007 | Chesapeake Operating, Inc. | Vela #250535789 | 15,000 |
| 631172 | Jan 19, 2007 | Jan 19, 2007 | Pogo Producing Company | Haynes, L. #17550535785 | 10,500 |
| 631170 | Jan 19, 2007 | Jan 19, 2007 | Pogo Producing Company | Haynes, L. #17450535784 | 10,600 |
| 631170Amendment | Jan 19, 2007 | Jan 19, 2007 | Pogo Producing Company LLC | Haynes, L. #17450535784 | 10,600 |
| 630599 | Jan 19, 2007 | Jan 19, 2007 | Chesapeake Operating, Inc. | O. M. Laurel Estate #1650535765 | 14,000 |
| 630596 | Jan 19, 2007 | Jan 19, 2007 | Chesapeake Operating, Inc. | O. M. Laurel Estate #1750535764 | 14,000 |
| 631898 | Jan 18, 2007 | Jan 18, 2007 | Houston Exploration Company, The | Haynes #2950535787 | 15,000 |
| 631898Amendment | Jan 18, 2007 | Jan 18, 2007 | Houston Exploration Company, The | Haynes #2950535787 | 15,000 |
| 631897 | Jan 18, 2007 | Jan 18, 2007 | Houston Exploration Company, The | Haynes #3450535786 | 15,000 |
| 631831 | Jan 18, 2007 | Jan 18, 2007 | Pogo Producing Company | Haynes, L. #17650535783 | 11,200 |
| 631831Amendment | Jan 18, 2007 | Jan 18, 2007 | Pogo Producing Company LLC | Haynes, L. #17650535783 | 11,200 |
| 631704 | Jan 12, 2007 | Jan 12, 2007 | Wagner Oil Company | Slator Ranch #4150535782 | 11,500 |
| 631718 | Jan 11, 2007 | Jan 11, 2007 | Houston Exploration Company, The | De Los Santos Gas Unit 1 #950535781 | 12,500 |
| 631709 | Jan 11, 2007 | Jan 11, 2007 | Newfield Exploration Company | Lopez #550535780 | 13,000 |
| 631494 | Jan 9, 2007 | Jan 9, 2007 | Chevron U. S. A. Inc. | M de Martinez #750535779 | 11,500 |
| 631405 | Jan 5, 2007 | Jan 5, 2007 | United Resources LP | Galo #350535778 | 10,500 |
| 631370 | Jan 4, 2007 | Jan 4, 2007 | Chevron U. S. A. Inc. | S. G. Marshall #2550535777 | 11,600 |
| 631353 | Jan 4, 2007 | Jan 4, 2007 | Ricochet Energy, Inc. | Cuellar #150535776 | 10,000 |
| 631031 | Dec 27, 2006 | Dec 27, 2006 | Houston Exploration Company, The | Bustamante Gas Unit 1 #1450535775 | 12,300 |
| 631018 | Dec 27, 2006 | Dec 27, 2006 | Chesapeake Operating, Inc. | Vela Estate #2350535774 | 12,000 |
| 631018Amendment | Dec 27, 2006 | Dec 27, 2006 | Chesapeake Operating, Inc. | Vela Estate #2350535774 | 12,000 |
| 631010 | Dec 27, 2006 | Dec 27, 2006 | Conocophillips Company | Cassin, Edward #950535773 | 12,600 |
| 631010Amendment | Dec 27, 2006 | Dec 27, 2006 | Conocophillips Company | Cassin, Edward #950535773 | 12,600 |
| 631010Amendment | Dec 27, 2006 | Dec 27, 2006 | Conocophillips Company | Cassin, Edward #950535773 | 12,600 |
| 628802 | Dec 27, 2006 | Dec 27, 2006 | Killam Oil Co., Ltd. | Hinnant Heirs "B" #11050531200 | 10,412 |
| 630969 | Dec 22, 2006 | Dec 22, 2006 | Eagle Oil & Gas Co. | Uribe #150535772 | 10,300 |
| 630969Amendment | Dec 22, 2006 | Dec 22, 2006 | Eagle Oil & Gas Co. | Uribe #150535772 | 10,300 |
| 630968 | Dec 22, 2006 | Dec 22, 2006 | Laredo Energy | Vela, G. O. et al "A" #250535771 | 12,000 |
| 630899 | Dec 21, 2006 | Dec 21, 2006 | Laredo Energy | Martinez-Uribe #350535535 | 9,200 |
| 630898 | Dec 21, 2006 | Dec 21, 2006 | Laredo Energy | San Fernando #150535282 | 10,200 |
| 630819 | Dec 21, 2006 | Dec 21, 2006 | Conocophillips Company | Jennings Ranch AA #4050535770 | 11,059 |
| 630744 | Dec 20, 2006 | Dec 20, 2006 | Pogo Producing Company | Haynes, L. #17350535769 | 10,300 |
| 630736 | Dec 20, 2006 | Dec 20, 2006 | Pogo Producing Company | Haynes, L #17250535768 | 10,800 |
| 630736Amendment | Dec 20, 2006 | Dec 20, 2006 | Pogo Producing Company LLC | Haynes, L #17250535768 | 10,800 |
| 630717 | Dec 19, 2006 | Dec 19, 2006 | Conocophillips Company | Jennings Ranch D #2850535767 | 13,100 |
| 630717Amendment | Dec 19, 2006 | Dec 19, 2006 | Conocophillips Company | Jennings Ranch D #2850535767 | 13,100 |
| 630651 | Dec 19, 2006 | Dec 19, 2006 | Peoples Energy Prod.-TX, L.P. | Jennings, J.D. #34150530098 | 4,425 |
| 630651Amendment | Dec 19, 2006 | Dec 19, 2006 | Peoples Energy Prod.-TX, L.P. | Jennings, J. D. #34150530098 | 4,425 |
| 630597 | Dec 18, 2006 | Dec 18, 2006 | U.S. Enercorp, Ltd. | Vela-Lopeno #150535596 | 13,200 |
| 630605 | Dec 15, 2006 | Dec 15, 2006 | Conocophillips Company | Jennings Ranch AA #4150535766 | 11,500 |
| 629911 | Dec 15, 2006 | Dec 15, 2006 | Conocophillips Company | Villarreal Gutierrez GU #550535761 | 10,800 |
| 629909 | Dec 15, 2006 | Dec 15, 2006 | Conocophillips Company | Villarreal Gutierrez GU #450535762 | 10,700 |
| 630514 | Dec 14, 2006 | Dec 14, 2006 | Aruba Petroleum, Inc. | Gutierrez #250535763 | 8,000 |
| 630464 | Dec 13, 2006 | Dec 13, 2006 | EOG Resources, Inc. | Flores-Calishe Ranch #450535760 | 9,500 |
| 630463 | Dec 13, 2006 | Dec 13, 2006 | Pogo Producing Company | Haynes, L #12150534998 | 9,900 |
| 630456 | Dec 13, 2006 | Dec 13, 2006 | Pogo Producing Company | Haynes, L. #10450534863 | 9,954 |
| 630455 | Dec 13, 2006 | Dec 13, 2006 | Pogo Producing Company | Haynes, L #9750534762 | 10,500 |
| 630449 | Dec 13, 2006 | Dec 13, 2006 | Pogo Producing Company | Haynes, L #9350534718 | 10,500 |
| 630448 | Dec 13, 2006 | Dec 13, 2006 | Pogo Producing Company | Haynes, L #9050534719 | 9,478 |
| 630443 | Dec 13, 2006 | Dec 13, 2006 | Pogo Producing Company | Haynes, L #8950534681 | 9,947 |
| 630443Amendment | Dec 13, 2006 | Dec 13, 2006 | Pogo Producing Company LLC | Haynes, L. #8950534681 | 9,800 |
| 630437 | Dec 13, 2006 | Dec 13, 2006 | Pogo Producing Company | Haynes, L #8550534666 | 9,850 |
| 630194 | Dec 8, 2006 | Dec 8, 2006 | Conocophillips Company | Jennings Ranch D #2950535758 | 13,000 |
| 630034 | Dec 6, 2006 | Dec 6, 2006 | Peoples Energy Prod.-TX, L.P. | Jennings, J.D. #48850535757 | 2,300 |
| 629997 | Dec 5, 2006 | Dec 5, 2006 | Laredo Energy | El Clareno #650535756 | 11,000 |
| 629997Amendment | Dec 5, 2006 | Dec 5, 2006 | El Paso E & P Company, L. P. | El Clareno #650535756 | 13,000 |
| 629940 | Dec 5, 2006 | Dec 5, 2006 | Wagner Oil Company | Slator Ranch #4050535755 | 12,500 |
| 629940Amendment | Dec 5, 2006 | Dec 5, 2006 | Wagner Oil Company | Slator Ranch #40ST50535755 | 12,500 |
| 629869 | Dec 4, 2006 | Dec 4, 2006 | Legend Natural Gas II, LP | Whittier Gas Unit No. 2 #150535754 | 15,000 |
| 629868 | Dec 1, 2006 | Dec 1, 2006 | Legend Natural Gas II, LP | Whittier Gas Unit No. 1 #150535753 | 15,000 |