Schully, Roberts, Slattery & Marino, A Professional Law Corporation

AROC, Inc.; Amerada Hess Corporation; American Resources Offshore, Inc.; AMRESCO Institutional, Inc.; Apex Oil and Gas, Inc.; Arguello, Inc.; Bank of America, N.A.; Bank of Texas, N.A.; Bank One, N.A.; Basin Exploration, Inc.; Blue Dolphin Exploration Company; BP America, Inc.; Burlington Resources Oil & Gas Company; Cal Dive International, Inc.; Carizzo Oil l& Gas, Inc.; Century Exploration Company; Chevron USA, Inc.; Citicorp, N.A.; Concert Capital Resources; Conoco, Inc.; Constellation Energy Company; Corcoran Jennison Management Company; Crescent Drilling & Production Company; Dominion Exploration & Production.; Energy Partners, Ltd.; Energy Resource Technology, Inc.; Enron North America; Enron Oil & Gas Company; Exxon/Mobil; Fidelity Exploration & Production Company; Gryphon Exploration Company; Hibernia National Bank; Hunt Petroleum (AEC), Inc.; Juniper Energy L.P.; Lyco Energy Corporation; Milam Energy, L.P.; Mission Resources Corporation; The NHP Foundation; NI Energy Ventures; Noble Affiliates, Inc.; Norsk Hydro US Oil & Gas, Inc.; Northstar Interests, LLC; Nuevo Energy Company; Ontra, Inc.; OPEX Energy LLC; PANACO, Inc.; Plains Exploration and Production Company; Pogo Producing Company; Prospective Investment & Trading, Ltd.; Prospera Energy, Inc.; Pure Resources, Inc.; Samedan Oil Corporation; Schlumberger International, Inc. and Subsidiaries; Seisco, Inc.; Seneca Resources; Sojitz Corporation; Source Petroleum, Inc.; Statoil ASA; Strassner Management, L.L.C.; Swift Energy Company; Thorntree Resources, L.L.C.; Titan Resources, Inc.; Torch Energy Advisors Incorporated; Tribo Production Company; Tri-Union Development Corporation; Union Bank of California; Union Pacific Resources Company; Universal Health Services, Inc.; Valley View Energy Partners Limited; Virgin Oil Company; Wagner Oil Company; Walter Oil and Gas Corporation; Weatherford International, Inc.; Wilmington Trust Company; W.R. Grace & Co. and Subsidiaries; Yuma Exploration and Production Company.

Available Upon Request.