(Located 0.8 Mi.N, on Farm Road 671) Discovery well of Luling Field, a major Texas oil area. Wildcatter E.B. Davis drilled on land owned by R. Rios. Well came in Aug. 10, 1922, after 3 dry holes had been drilled in same area. Magnolia (now Mobil) Oil Co. bought filed 1926. By 1969, production was 135,000,000 barrels. Incise on back: Donated by Mobil Oil Corporation.