Original correspondence; 49 letters
Original correspondence; 36 letters
Original correspondences; 19 letters, 2 drawings
Original correspondence; 25 letters
Original correspondence; 54 letters, 2 without envelopes
Original correspondence; 24 letters
Original correspondence; 24 letters and cards
Original correspondence; 16 letters, Yale
Original correspondence; 1 letter, with envelope
Original correspondence; 32 letters
Original correspondence; 53 letters
Original correspondence; 52 letters
Original correspondence
Original correspondences; 7 letters. Includes some typescripts of letters.
Original correspondence; 1 letter, from Saratoga Springs, New York
Correspondence - Typescript; 1 letter
1 photograph (17 by 22 inches)
5 photographs, tracings with analysis, and correspondence with U.S. War Department's Office of the Chief of the Air Corps
1 color photograph (12 by 14 inches)
1 color photograph (11.5 by 16 inches)