| 660710Amendment | May 15, 2008 | May 15, 2008 | Columbus Energy, LLC | Clark, N. H. #19 | 8,200 | 47940216 |
| 660710Amendment | May 15, 2008 | May 15, 2008 | Columbus Energy, LLC | Clark, N. H. #19 | 8,200 | 47940216 |
| 660629 | May 15, 2008 | May 15, 2008 | St. Mary Land & Exploration Co. | Petty Ranch #1919 | 6,600 | 47940215 |
| 660608 | May 14, 2008 | May 14, 2008 | Conocophillips Company | Carr #150 | 9,800 | 47940214 |
| 660588 | May 14, 2008 | May 14, 2008 | St. Mary Land & Exploration Co. | Petty Ranch #1620 | 6,630 | 47940213 |
| 660532 | May 14, 2008 | May 14, 2008 | Conocophillips Company | Lundell #99 | 11,250 | 47940212 |
| 660532Amendment | May 14, 2008 | May 14, 2008 | Conocophillips Company | Lundell #99 | 11,250 | 47940212 |
| 660525 | May 14, 2008 | May 14, 2008 | Legend Natural Gas III, LP | Galvan Ranch J8 #1 | 8,000 | 47940211 |
| 660507 | May 14, 2008 | May 14, 2008 | Conocophillips Company | B.M.T. #196 | 10,980 | 47940209 |
| 660200 | May 14, 2008 | May 14, 2008 | St. Mary Land & Exploration Co. | Briscoe "J" #1006 | 5,300 | 47940205 |
| 660514 | May 13, 2008 | May 13, 2008 | Columbus Energy, LLC | Hachar, D. D. #42 | 6,750 | 47940210 |
| 660514Amendment | May 13, 2008 | May 13, 2008 | Columbus Energy, LLC | Hachar, D. D. #42 | 6,750 | 47940210 |
| 660468 | May 13, 2008 | May 13, 2008 | Lewis Petro Properties, Inc. | Saunders 108 #16 | 7,200 | 47940208 |
| 660450 | May 9, 2008 | May 9, 2008 | Rosetta Resources Operating LP | South Callaghan Ranch #293 | 8,998 | 47940077 |
| 660160 | May 6, 2008 | May 6, 2008 | St. Mary Land & Exploration Co. | Briscoe "J" #1005 | 5,300 | 47940204 |
| 660122 | May 5, 2008 | May 5, 2008 | St. Mary Land & Exploration Co. | Petty Ranch #2218 | 6,570 | 47940203 |
| 657355 | May 5, 2008 | May 5, 2008 | Enterprise Products Operatingllc | Rectifier Magu-6 #M006GU | 400 | 47940207 |
| 657354 | May 5, 2008 | May 5, 2008 | Enterprise Products Operatingllc | Rectifier PH2-71.4 #2714PH | 500 | 47940206 |
| 660075 | May 2, 2008 | May 2, 2008 | Legend Natural Gas III, LP | Galvan Ranch J13 #1 | 8,000 | 47940202 |
| 660074 | May 2, 2008 | May 2, 2008 | Legend Natural Gas III, LP | Galvan Ranch J11 #1 | 8,000 | 47940200 |
| 660071 | May 2, 2008 | May 2, 2008 | Legend Natural Gas III, LP | Galvan Ranch J7 #1 | 8,000 | 47940201 |
| 660070 | May 2, 2008 | May 2, 2008 | Legend Natural Gas III, LP | Galvan Ranch J6 #1 | 8,000 | 47940199 |
| 660066 | May 2, 2008 | May 2, 2008 | Killam Oil Co., Ltd. | K&H Fee 942 #7 | 7,500 | 47940198 |
| 660052 | May 2, 2008 | May 2, 2008 | Virtex Operating Company, Inc. | Martin Trust's St of TX #6603 | 7,250 | 47940197 |
| 659940 | May 1, 2008 | May 1, 2008 | St. Mary Land & Exploration Co. | Briscoe "E" #1011 | 6,100 | 47940194 |
| 659933 | May 1, 2008 | May 1, 2008 | St. Mary Land & Exploration Co. | Briscoe "E" #1013 | 6,100 | 47940195 |
| 659915 | May 1, 2008 | May 1, 2008 | Txco Resources Inc. | Briscoe Chupadera Ranch #1HH | 10,500 | 47939786 |
| 659510 | Apr 30, 2008 | Apr 30, 2008 | Awp Operating Company | Booth, W. V. #16 | 6,750 | 47940196 |
| 659633 | Apr 26, 2008 | Apr 26, 2008 | Lewis Petro Properties, Inc. | Palafox Exploration Co. 2182 #36 | 7,200 | 47940191 |
| 659631 | Apr 26, 2008 | Apr 26, 2008 | Lewis Petro Properties, Inc. | Palafox Exploration Co. 2182 #87 | 7,200 | 47940192 |
| 659621 | Apr 26, 2008 | Apr 26, 2008 | Lewis Petro Properties, Inc. | Palafox #45 | 7,200 | 47940190 |
| 659535 | Apr 26, 2008 | Apr 26, 2008 | Lewis Petro Properties, Inc. | Briscoe-Manry 1393 #7 | 8,000 | 47940189 |
| 659512 | Apr 26, 2008 | Apr 26, 2008 | Bluestone Natural Resources, LLC | G.B.G. Ranch #1 | 9,700 | 47940188 |
| 659511 | Apr 26, 2008 | Apr 26, 2008 | Rosetta Resources Operating LP | South Callaghan Ranch #305 | 8,840 | 47940187 |
| 659492 | Apr 26, 2008 | Apr 26, 2008 | Virtex Operating Company, Inc. | E.S. Johns Estate #10 | 7,800 | 47940186 |
| 659365 | Apr 25, 2008 | Apr 25, 2008 | San Isidro Development Co, L. C. | Alexander #1 | 8,000 | 47940185 |
| 659365Amendment | Apr 25, 2008 | Apr 25, 2008 | San Isidro Development Co, L. C. | Alexander #1 | 8,000 | 47940185 |
| 659365Amendment | Apr 25, 2008 | Apr 25, 2008 | San Isidro Development Co, L. C. | Alexander #1 | 8,400 | 47940185 |
| 659064 | Apr 23, 2008 | Apr 23, 2008 | St. Mary Land & Exploration Co. | Petty Ranch #1215 | 6,700 | 47940183 |
| 659028 | Apr 23, 2008 | Apr 23, 2008 | Lewis Petro Properties, Inc. | Owen #7 | 8,000 | 47940182 |
| 658930 | Apr 21, 2008 | Apr 21, 2008 | Legend Natural Gas III, LP | Galvan Ranch L13 #1 | 8,000 | 47940180 |
| 658930Amendment | Apr 21, 2008 | Apr 21, 2008 | Legend Natural Gas III, LP | Galvan Ranch L13 #1 | 8,000 | 47940180 |
| 658929 | Apr 21, 2008 | Apr 21, 2008 | Legend Natural Gas III, LP | Galvan Ranch L12 #1 | 8,000 | 47940179 |
| 658929Amendment | Apr 21, 2008 | Apr 21, 2008 | Legend Natural Gas III, LP | Galvan Ranch L12 #1 | 8,000 | 47940179 |
| 658914 | Apr 21, 2008 | Apr 21, 2008 | Legend Natural Gas III, LP | Galvan Ranch L10 #1 | 8,000 | 47940178 |
| 658913 | Apr 21, 2008 | Apr 21, 2008 | Legend Natural Gas III, LP | Galvan Ranch L8 #1 | 8,000 | 47940176 |
| 658911 | Apr 21, 2008 | Apr 21, 2008 | Legend Natural Gas III, LP | Galvan Ranch L7 #1 | 8,000 | 47940177 |
| 658908 | Apr 21, 2008 | Apr 21, 2008 | Legend Natural Gas III, LP | Galvan Ranch L5 #1 | 8,000 | 47940175 |
| 658872 | Apr 21, 2008 | Apr 21, 2008 | St. Mary Land & Exploration Co. | Briscoe "B" #1219 | 5,950 | 47940174 |
| 658856 | Apr 18, 2008 | Apr 18, 2008 | Virtex Operating Company, Inc. | J. Martin St of TX #6603 | 7,200 | 47940173 |
| 658797 | Apr 18, 2008 | Apr 18, 2008 | EOG Resources, Inc. | Garner, Tully C. #97HH | 11,000 | 47940172 |
| 658797Amendment | Apr 18, 2008 | Apr 18, 2008 | EOG Resources, Inc. | Garner, Tully C. #97HH | 11,000 | 47940172 |
| 657876 | Apr 16, 2008 | Apr 16, 2008 | Killam Oil Co., Ltd. | Killam & Hurd Fee 1614 #4 | 11,000 | 47940184 |
| 659418 | Apr 14, 2008 | Apr 14, 2008 | EOG Resources, Inc. | Garner, Tully C. #98 | 11,000 | 47940181 |
| 658487 | Apr 14, 2008 | Apr 14, 2008 | EOG Resources, Inc. | Slator Ranch #W 5 | 13,000 | 47940170 |
| 658532 | Apr 12, 2008 | Apr 12, 2008 | Virtex Operating Company, Inc. | Lundell Minerals #2 | 10,800 | 47940171 |
| 658403 | Apr 11, 2008 | Apr 11, 2008 | Lewis Petro Properties, Inc. | Maltsberger, J. T. Jr. "C" #3 | 8,000 | 47940168 |
| 658293 | Apr 10, 2008 | Apr 10, 2008 | Rosetta Resources Operating LP | South Callaghan Ranch #303 | 8,550 | 47940167 |
| 658239 | Apr 10, 2008 | Apr 10, 2008 | Lewis Petro Properties, Inc. | Saunders 108 H #4 | 13,000 | 47940166 |
| 658239Amendment | Apr 10, 2008 | Apr 10, 2008 | Lewis Petro Properties, Inc. | Saunders 108 "H" #4H | 13,000 | 47940166 |
| 658227 | Apr 10, 2008 | Apr 10, 2008 | St. Mary Land & Exploration Co. | Briscoe "G" #1038 | 6,300 | 47940165 |
| 658227Amendment | Apr 10, 2008 | Apr 10, 2008 | St. Mary Land & Exploration Co. | Briscoe "G" #1038 | 8,750 | 47940165 |
| 658401 | Apr 9, 2008 | Apr 9, 2008 | Lewis Petro Properties, Inc. | Garner Ranch 816 #3 | 7,200 | 47940169 |
| 658196 | Apr 9, 2008 | Apr 9, 2008 | Kerr-McGee Oil & Gas Onshore LP | McKendrick, W. H. et Al #29 | 10,000 | 47940164 |
| 658196Amendment | Apr 9, 2008 | Apr 9, 2008 | Kerr-McGee Oil & Gas Onshore LP | McKendrick, W. H. et Al #29 | 11,000 | 47940164 |
| 658196Amendment | Apr 9, 2008 | Apr 9, 2008 | Kerr-McGee Oil & Gas Onshore LP | McKendrick, W. H. et Al #29 | 11,000 | 47940164 |
| 658158 | Apr 9, 2008 | Apr 9, 2008 | Rosetta Resources Operating LP | South Callaghan Ranch #304 | 8,200 | 47940163 |
| 658151 | Apr 9, 2008 | Apr 9, 2008 | Rosetta Resources Operating LP | South Callaghan Ranch #302 | 8,690 | 47940162 |
| 658140 | Apr 8, 2008 | Apr 8, 2008 | St. Mary Land & Exploration Co. | Briscoe "C" #1149 | 5,800 | 47940161 |
| 658045 | Apr 7, 2008 | Apr 7, 2008 | Virtex Operating Company, Inc. | Palafox Exploration Co. #1502 | 7,100 | 47940160 |
| 658029 | Apr 7, 2008 | Apr 7, 2008 | St. Mary Land & Exploration Co. | Briscoe "G" #1260 | 6,450 | 47940159 |
| 657809 | Apr 2, 2008 | Apr 2, 2008 | Lewis Petro Properties, Inc. | Palafox Exploration Co. 876 #68 | 7,200 | 47940158 |
| 657564 | Mar 28, 2008 | Mar 28, 2008 | St. Mary Land & Exploration Co. | Gates 05S #903 | 7,000 | 47940157 |
| 657521 | Mar 27, 2008 | Mar 27, 2008 | Conocophillips Company | Warren, W.K. #6 | 10,015 | 47940155 |
| 657500 | Mar 26, 2008 | Mar 26, 2008 | Rosetta Resources Operating LP | South Callaghan Ranch #301 | 8,703 | 47940156 |
| 657491 | Mar 26, 2008 | Mar 26, 2008 | Lewis Petro Properties, Inc. | Saunders State 108 "A" #20 | 7,200 | 47940154 |
| 657424 | Mar 26, 2008 | Mar 26, 2008 | Lewis Petro Properties, Inc. | Saunders 108 #11 | 7,200 | 47940153 |
| 657424Amendment | Mar 26, 2008 | Mar 26, 2008 | Lewis Petro Properties, Inc. | Saunders 108 #11 | 7,200 | 47940153 |
| 657270 | Mar 25, 2008 | Mar 25, 2008 | Lewis Petro Properties, Inc. | Palafox Exploration Co. 109 #42 | 7,200 | 47940151 |
| 657510 | Mar 24, 2008 | Mar 24, 2008 | Virtex Operating Company, Inc. | Fasken L. & M. St of TX "C" #5701 | 7,000 | 47940152 |
| 657122 | Mar 24, 2008 | Mar 24, 2008 | Kerr-McGee Oil & Gas Onshore LP | McKendrick #27 | 10,000 | 47940150 |
| 657122Amendment | Mar 24, 2008 | Mar 24, 2008 | Kerr-McGee Oil & Gas Onshore LP | McKendrick #27 | 11,000 | 47940150 |
| 657122Amendment | Mar 24, 2008 | Mar 24, 2008 | Kerr-McGee Oil & Gas Onshore LP | McKendrick #27 | 11,000 | 47940150 |
| 657085 | Mar 24, 2008 | Mar 24, 2008 | Lewis Petro Properties, Inc. | Booth, W.V. et al, 2292 H #9AH | 13,000 | 47940149 |
| 657083 | Mar 21, 2008 | Mar 21, 2008 | Lewis Petro Properties, Inc. | Palafox Exploration Co. 2182 #11 | 7,200 | 47940148 |
| 656926 | Mar 21, 2008 | Mar 21, 2008 | EOG Resources, Inc. | Gallagher, Gloria B. #7HH | 13,000 | 47940146 |
| 656978 | Mar 20, 2008 | Mar 20, 2008 | Lewis Petro Properties, Inc. | Laurel 1931 #12A | 7,200 | 47940147 |
| 656914 | Mar 19, 2008 | Mar 19, 2008 | EOG Resources, Inc. | Slator Ranch #2AB | 12,000 | 47940144 |
| 656913 | Mar 19, 2008 | Mar 19, 2008 | EOG Resources, Inc. | Slator Ranch #1AD | 11,000 | 47940143 |
| 656889 | Mar 19, 2008 | Mar 19, 2008 | Rosetta Resources Operating LP | South Callaghan Ranch #300 | 9,150 | 47940142 |
| 656882 | Mar 19, 2008 | Mar 19, 2008 | EOG Resources, Inc. | Vaquillas Borrego #29HH | 12,000 | 47940141 |
| 656927 | Mar 18, 2008 | Mar 18, 2008 | Devon Energy Production Co, L.P. | Bonebrake #9 | 10,000 | 47940145 |
| 656870 | Mar 18, 2008 | Mar 18, 2008 | Rosetta Resources Operating LP | Stanford, P. H. #6 | 10,500 | 47940140 |
| 656864 | Mar 18, 2008 | Mar 18, 2008 | Lewis Petro Properties, Inc. | Palafox Exploration Co. 2292 #25 | 7,400 | 47940139 |
| 656863 | Mar 18, 2008 | Mar 18, 2008 | Lewis Petro Properties, Inc. | Palafox Exploration Co. 2292 #21 | 7,400 | 47940138 |
| 656809 | Mar 17, 2008 | Mar 17, 2008 | EOG Resources, Inc. | El Viejito "B" #5 | 10,500 | 47940137 |
| 656535 | Mar 14, 2008 | Mar 14, 2008 | St. Mary Land & Exploration Co. | Briscoe "B" #1198 | 5,800 | 47940130 |
| 656713 | Mar 13, 2008 | Mar 13, 2008 | Legend Natural Gas III, LP | Galvan Ranch L6 #1 | 8,000 | 47940136 |
| 656686 | Mar 13, 2008 | Mar 13, 2008 | EOG Resources, Inc. | Dulaney-Bruni #1HH | 13,000 | 47940135 |
| 656686Amendment | Mar 13, 2008 | Mar 13, 2008 | EOG Resources, Inc. | Dulaney-Bruni #1 | 13,000 | 47940135 |