| 634319 | Mar 30, 2007 | Mar 30, 2007 | Rockford Energy Partners II, LLC | San Ambrosia "B" #5 | 4,300 | 47939797 |
| 635692 | Mar 29, 2007 | Mar 29, 2007 | Evans, S. Lavon Jr. Oper. Co. | L.O.M.T. #11 | 10,000 | 47939796 |
| 635692Amendment | Mar 29, 2007 | Mar 29, 2007 | Evans, S. Lavon Jr. Oper. Co. | Los Ojuelos Mineral Trust #11 | 8,500 | 47939796 |
| 635558 | Mar 29, 2007 | Mar 29, 2007 | Blackbrush O & G, Inc. | Gates Ranch D 4 #1287 | 5,800 | 47939793 |
| 634393 | Mar 29, 2007 | Mar 29, 2007 | Rockford Energy Partners II, LLC | Briscoe "J" #40 | 5,500 | 47939799 |
| 635633 | Mar 28, 2007 | Mar 28, 2007 | Thorp Petroleum Corporation | Reese, Bailey #3 | 13,000 | 47938833 |
| 634061 | Mar 28, 2007 | Mar 28, 2007 | Rockford Energy Partners II, LLC | Briscoe "C" #8068 | 8,205 | 47931472 |
| 635600 | Mar 27, 2007 | Mar 27, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #262 | 7,400 | 47939795 |
| 635600Amendment | Mar 27, 2007 | Mar 27, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #262 | 6,700 | 47939795 |
| 635583 | Mar 27, 2007 | Mar 27, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #261 | 9,500 | 47939794 |
| 635444 | Mar 26, 2007 | Mar 26, 2007 | Conocophillips Company | B.M.T. A #7 | 11,000 | 47938290 |
| 633872 | Mar 26, 2007 | Mar 26, 2007 | Rockford Energy Partners II, LLC | Briscoe 'C' #569 | 600 | 47931908 |
| 635214 | Mar 22, 2007 | Mar 22, 2007 | Lgdc Corporation | Armstrong '258' #1 | 15,000 | 47939792 |
| 635214Amendment | Mar 22, 2007 | Mar 22, 2007 | Lgdc Corporation | Armstrong '258' #1 | 13,310 | 47939792 |
| 635214Amendment | Mar 22, 2007 | Mar 22, 2007 | Lgdc Corporation | Armstrong '258' #1 | 13,310 | 47939792 |
| 635185 | Mar 20, 2007 | Mar 20, 2007 | Lewis Petro Properties, Inc. | Owen Briscoe 1133 #5 | 7,800 | 47939791 |
| 635050 | Mar 20, 2007 | Mar 20, 2007 | Conocophillips Company | Mata-Thomas GU #2 | 10,100 | 47939790 |
| 635050Amendment | Mar 20, 2007 | Mar 20, 2007 | Conocophillips Company | Mata-Thomas GU #2 | 10,100 | 47939790 |
| 633775 | Mar 20, 2007 | Mar 20, 2007 | Rockford Energy Partners II, LLC | Briscoe "J" #53 | 5,200 | 47939785 |
| 633737 | Mar 20, 2007 | Mar 20, 2007 | Killam Oil Co., Ltd. | K&H Fee "1619" #2 | 9,246 | 47936209 |
| 635049 | Mar 19, 2007 | Mar 19, 2007 | Conocophillips Company | Warren, W. K. #4 | 10,100 | 47939789 |
| 634928 | Mar 15, 2007 | Mar 15, 2007 | Rosetta Resources Operating LP | El Corazon Ranch #14 | 8,500 | 47939788 |
| 634899 | Mar 15, 2007 | Mar 15, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #260 | 9,400 | 47939787 |
| 634230 | Mar 15, 2007 | Mar 15, 2007 | Rockford Energy Partners II, LLC | Briscoe "G" #4 | 5,200 | 47939778 |
| 634812 | Mar 14, 2007 | Mar 14, 2007 | Anadarko E&P Company LP | Briscoe Chupadera Ranch #1 | 13,000 | 47939786 |
| 634530 | Mar 13, 2007 | Mar 13, 2007 | Conocophillips Company | B.M.T. A #11 | 10,594 | 47938390 |
| 634668 | Mar 12, 2007 | Mar 12, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #259 | 8,000 | 47939784 |
| 634557 | Mar 9, 2007 | Mar 9, 2007 | Conocophillips Company | Arco Fee #10 | 12,600 | 47939783 |
| 634501 | Mar 8, 2007 | Mar 8, 2007 | Thorp Petroleum Corporation | Bailey-Reese #2 | 13,000 | 47938574 |
| 634493 | Mar 8, 2007 | Mar 8, 2007 | Thorp Petroleum Corporation | Villarreal #1 | 12,500 | 47938124 |
| 634314 | Mar 7, 2007 | Mar 7, 2007 | Lewis Petro Properties, Inc. | Webb County School Land 1383 #30 | 7,600 | 47939781 |
| 634305 | Mar 7, 2007 | Mar 7, 2007 | Lewis Petro Properties, Inc. | Beasley Welhausen State 104 #54 | 7,200 | 47939780 |
| 634303 | Mar 7, 2007 | Mar 7, 2007 | Lewis Petro Properties, Inc. | Meador State #14 | 7,200 | 47939779 |
| 634338 | Mar 6, 2007 | Mar 6, 2007 | Killam Oil Co., Ltd. | Vaquillas Borrego #26 | 3,900 | 47939782 |
| 634197 | Mar 2, 2007 | Mar 2, 2007 | EOG Resources, Inc. | La Purisma Ranch #1 | 12,500 | 47938945 |
| 634164 | Mar 2, 2007 | Mar 2, 2007 | Rockford Energy Partners II, LLC | Briscoe #1080 | 9,145 | 47939270 |
| 634087 | Feb 28, 2007 | Feb 28, 2007 | Thorp Petroleum Corporation | Bailey Reese #1 | 14,500 | 47938342 |
| 633985 | Feb 27, 2007 | Feb 27, 2007 | Lewis Petro Properties, Inc. | Meador State #13 | 7,200 | 47939777 |
| 633962 | Feb 26, 2007 | Feb 26, 2007 | Ricochet Energy, Inc. | Running "W" 598 #3 | 10,000 | 47939776 |
| 633721 | Feb 22, 2007 | Feb 22, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #249 | 8,600 | 47939680 |
| 633708 | Feb 22, 2007 | Feb 22, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #246 | 8,600 | 47939679 |
| 633594 | Feb 16, 2007 | Feb 16, 2007 | Rosetta Resources Operating LP | El Corazon Ranch #12 | 8,500 | 47939775 |
| 633573 | Feb 16, 2007 | Feb 16, 2007 | Rosetta Resources Operating LP | El Corazon Ranch #5 | 8,590 | 47939774 |
| 633573Amendment | Feb 16, 2007 | Feb 16, 2007 | Rosetta Resources Operating LP | El Corazon Ranch #5 | 8,700 | 47939774 |
| 633489 | Feb 16, 2007 | Feb 16, 2007 | EOG Resources, Inc. | Norvehc #1HH | 11,000 | 47939773 |
| 633505 | Feb 15, 2007 | Feb 15, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #258 | 9,000 | 47939771 |
| 633424 | Feb 15, 2007 | Feb 15, 2007 | Lewis Petro Properties, Inc. | Owen 2 #4 | 7,600 | 47939772 |
| 633375 | Feb 15, 2007 | Feb 15, 2007 | EOG Resources, Inc. | El Viejito "C" #2HH | 13,000 | 47939770 |
| 633372 | Feb 13, 2007 | Feb 13, 2007 | Blackbrush O & G, Inc. | Gates Ranch "Y" #4012A | 5,920 | 47939769 |
| 633210 | Feb 13, 2007 | Feb 13, 2007 | Rockford Energy Partners II, LLC | Briscoe "E" #308 | 5,000 | 47939764 |
| 632827 | Feb 13, 2007 | Feb 13, 2007 | U.S. Enercorp, Ltd. | Stroman-Armstrong #5 | 14,500 | 47939767 |
| 632827Amendment | Feb 13, 2007 | Feb 13, 2007 | U.S. Enercorp, Ltd. | Stroman-Armstrong #5 | 14,500 | 47939767 |
| 633305 | Feb 12, 2007 | Feb 12, 2007 | EOG Resources, Inc. | Benavides FMT #9HH | 12,500 | 47939768 |
| 633294 | Feb 12, 2007 | Feb 12, 2007 | EOG Resources, Inc. | Slator Ranch #W 4 | 12,500 | 47939766 |
| 633239 | Feb 10, 2007 | Feb 10, 2007 | Lewis Petro Properties, Inc. | Jones D #9 | 7,600 | 47939765 |
| 633148 | Feb 9, 2007 | Feb 9, 2007 | Lewis Petro Properties, Inc. | Meador State #7 | 7,200 | 47939763 |
| 633068 | Feb 9, 2007 | Feb 9, 2007 | Killam Oil Co., Ltd. | Vaquillas-Borrego #25 | 8,800 | 47939762 |
| 632883 | Feb 6, 2007 | Feb 6, 2007 | Mohican Oil & Gas, LLC | Olmitos Ranch 1529 #4 | 11,000 | 47939761 |
| 632832 | Feb 5, 2007 | Feb 5, 2007 | Lewis Petro Properties, Inc. | Jones D #7 | 7,600 | 47939760 |
| 632820 | Feb 5, 2007 | Feb 5, 2007 | Lewis Petro Properties, Inc. | Beasley State 97 #36 | 7,200 | 47939759 |
| 632775 | Feb 2, 2007 | Feb 2, 2007 | Conocophillips Company | B.M.T. A #26 | 9,400 | 47939758 |
| 632769 | Feb 2, 2007 | Feb 2, 2007 | EOG Resources, Inc. | South Marshall State-WF GU #6HH | 12,500 | 47939757 |
| 632773 | Feb 1, 2007 | Feb 1, 2007 | Conocophillips Company | Billings Heirs #5 | 9,400 | 47939756 |
| 632654 | Jan 31, 2007 | Jan 31, 2007 | Conocophillips Company | Benavides, Rosa V. E #110 | 9,100 | 47939755 |
| 632563 | Jan 30, 2007 | Jan 30, 2007 | Killam Oil Co., Ltd. | Killam & Hurd Fee 1504 #2 | 10,000 | 47939754 |
| 632493 | Jan 29, 2007 | Jan 29, 2007 | Killam Oil Co., Ltd. | Killam&hurd Fee Porcion 16 #3 | 5,000 | 47939753 |
| 632493Amendment | Jan 29, 2007 | Jan 29, 2007 | Killam Oil Co., Ltd. | Killam&hurd Fee Porcion 16 #3 | 5,010 | 47939753 |
| 632428 | Jan 26, 2007 | Jan 26, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #256 | 8,500 | 47939752 |
| 632357 | Jan 25, 2007 | Jan 25, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #255 | 9,800 | 47939751 |
| 632352 | Jan 25, 2007 | Jan 25, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #257 | 9,000 | 47939750 |
| 632315 | Jan 24, 2007 | Jan 24, 2007 | Rockford Energy Partners II, LLC | Briscoe "E" #307 | 5,000 | 47939749 |
| 632314 | Jan 24, 2007 | Jan 24, 2007 | Rockford Energy Partners II, LLC | Briscoe "E" #306 | 5,000 | 47939748 |
| 632309 | Jan 24, 2007 | Jan 24, 2007 | Rockford Energy Partners II, LLC | Briscoe "E" #305 | 5,000 | 47939747 |
| 632257 | Jan 24, 2007 | Jan 24, 2007 | Rockford Energy Partners II, LLC | Briscoe "E" #153 | 5,000 | 47939746 |
| 632096 | Jan 23, 2007 | Jan 23, 2007 | EOG Resources, Inc. | South Marshall State-WF GU #7 | 12,500 | 47939745 |
| 631962 | Jan 18, 2007 | Jan 18, 2007 | Chesapeake Operating, Inc. | Callaghan Ranch #68 | 9,000 | 47939744 |
| 631926 | Jan 18, 2007 | Jan 18, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #251 | 8,500 | 47939743 |
| 631790 | Jan 12, 2007 | Jan 12, 2007 | Mohican Oil & Gas, LLC | Olmitos Ranch 463 #3 | 10,150 | 47939742 |
| 631765 | Jan 12, 2007 | Jan 12, 2007 | Conocophillips Company | B.M.T. #180 | 9,110 | 47939741 |
| 631753 | Jan 11, 2007 | Jan 11, 2007 | Conocophillips Company | B.M.T. A #23 | 9,350 | 47939740 |
| 631664 | Jan 11, 2007 | Jan 11, 2007 | EOG Resources, Inc. | Gallagher, Gloria B. #6 | 13,300 | 47939739 |
| 631389 | Jan 5, 2007 | Jan 5, 2007 | Killam Oil Co., Ltd. | Killam and Hurd Fee Block 61 #1 | 10,200 | 47939738 |
| 631346 | Jan 4, 2007 | Jan 4, 2007 | Rockford Energy Partners II, LLC | Briscoe "E"-A #5070 | 5,000 | 47939737 |
| 631344 | Jan 4, 2007 | Jan 4, 2007 | Rockford Energy Partners II, LLC | Briscoe "E"-A #4070 | 5,000 | 47939736 |
| 631314 | Jan 4, 2007 | Jan 4, 2007 | Rockford Energy Partners II, LLC | Briscoe "E"-A #3070 | 5,000 | 47939735 |
| 631313 | Jan 4, 2007 | Jan 4, 2007 | Rockford Energy Partners II, LLC | Briscoe "E"-A #2070 | 5,000 | 47939734 |
| 631162 | Dec 29, 2006 | Dec 29, 2006 | Chesapeake Operating, Inc. | Bruni Mineral Trust "A" #22 | 12,000 | 47934671 |
| 631009 | Dec 28, 2006 | Dec 28, 2006 | Conocophillips Company | B.M.T. #192 | 8,400 | 47939733 |
| 630932 | Dec 21, 2006 | Dec 21, 2006 | Rosetta Resources Operating LP | South Callaghan Ranch #254 | 9,100 | 47939732 |
| 630932Amendment | Dec 21, 2006 | Dec 21, 2006 | Rosetta Resources Operating LP | South Callaghan Ranch #254 | 9,100 | 47939732 |
| 630889 | Dec 21, 2006 | Dec 21, 2006 | Lewis Petro Properties, Inc. | Beasley Welhausen State 104 #64 | 7,200 | 47939731 |
| 630886 | Dec 21, 2006 | Dec 21, 2006 | Lewis Petro Properties, Inc. | Beasley State 97 #68 | 7,200 | 47939729 |
| 630886Amendment | Dec 21, 2006 | Dec 21, 2006 | Lewis Petro Properties, Inc. | Beasley State 97 #68 | 7,200 | 47939729 |
| 630876 | Dec 21, 2006 | Dec 21, 2006 | Killam Oil Co., Ltd. | Killam-Hurd-McLean 610 #2 | 13,500 | 47939730 |
| 630876Amendment | Dec 21, 2006 | Dec 21, 2006 | Killam Oil Co., Ltd. | Killam-Hurd-McLean 610 #2 | 13,705 | 47939730 |
| 630774 | Dec 21, 2006 | Dec 21, 2006 | Virtex Petroleum Company, Inc. | J. Martin-State of Texas #7901 | 7,500 | 47939727 |
| 630772 | Dec 21, 2006 | Dec 21, 2006 | Virtex Petroleum Company, Inc. | J. Martin-State of Texas #6602 | 7,500 | 47939728 |
| 630760 | Dec 21, 2006 | Dec 21, 2006 | Virtex Petroleum Company, Inc. | Fasken L. & M. -St. of TX. 53-A #2 | 7,000 | 47939726 |
| 630746 | Dec 20, 2006 | Dec 20, 2006 | EOG Resources, Inc. | Billings B #8HH | 13,000 | 47939724 |
| 630746Amendment | Dec 20, 2006 | Dec 20, 2006 | EOG Resources, Inc. | Billings #8HH | 13,000 | 47939724 |