Aston Meadows, Ltd. v. Devon Energy Production Co., 359 S.W.3d 856 (Tex. App. – Ft. Worth 2012)

(landowners claimed they were bona fide purchasers for value upon discovering that purchased tract of land spanning two contiguous counties had oil and gas lease encumbering property; lease had been filed in only one county; court held that instrument addressing land in contiguous counties need only be filed in one county and is sufficient to establish constructive notice under state (TX) law).