Technical manual TM 1-405 from the United States War Department about aircraft engines. Prepared under direction of the Chief of the Air Corps. The booklet is divided into six sections: I. Internal-combustion engine principles, II. Classification and description of engine types, III. Description and construction of engine units, IV. Repair principles, V. Engine lubrication, and VI. Engine cooling. All chapters include information and drawings for reference.

A mailing receipt for a letter from Mrs. Helen McKee to Jacqueline Cochran on July 9, 1970. It includes addresses for the two locations, and includes a stamp on the back.