Photograph of C. H. Schildauer, Pan-American Airline's chief of operations engineers; Colonel Clarence M. Young, former director of the aeronautics branch of the United States Department of Commerce and acting for Pan-American Airlines; and L. L .Odell, chief airport engineer for the line, standing in front of part of an airplane. They were in Los Angeles during a tour to inspect potential airport sites for Pan-American Airways.
Portrait photograph of Ernest Walker Sawyer, engineer, who was appointed executive assistant to the Secretary of the Interior, Ray Lyman Wilbur, on March 12, 1929. He is seated on a bed, probably in a hotel room.
William Hawley Bowlus, wearing a light-colored 3-piece suit, standing next to a Ryan single engine monoplane in a dirt airfield. Two men stand next to the plane in the background.