Postcard of a four story hotel behind a line of trees. The hotel is identified by the type below the picture, "Majestic Hotel, Lake Charles, LA." The letter to the side reads, "Dear Mamie am on lake Charls today. Won't drive in this evening. Having a dandy time. Nov. 18th 1905 Lucile." The postcard is addressed to "Miss Mamie McFaddin Calder Drive Beaumont, Texas."

Interview with J. Frank Rollins, an oilman and a geophysicist, concerning his work experience with Petty Geophysical Engineering Company doing refraction seismic work; his employment with Geophysical Service, Inc.; doing reflection and refraction work in 1936; oil exploration in South America; work in oil field instrumentation equipment; work as a "computer" interpreting geological data; founding of Rayflex Exploration Company in 1948; technological developments for oil field exploration; geochemical surveying; the sale of Rayflex to Phillips-Eckhart in 1962; his work as a geophysical consultant; the application of oil field technology to national defense; German espionage activity in South America during World War II; and pro-German activity in South Louisiana during World War II.