Letters in this file include:

Cottam, W. P. 10 May 1930

Coville, Frederick V. 2 November 1935, 15 November 1935, 16 December 1935

Crocker, William 8 August 1932

Croizat, Leon 22 May 1948

Cratty, R. I. 20 January 1930

Cutak, Ladislaus 25 July 1941

Davis, Ray J. 15 January 1938, 28 February 1938, 13 December 1938, 23 February 1939

Dayton, W. A. 2 February 1940, 20 February 1940, 26 February 1941, 24 April 1941, 8 May 1942, 27 August 1942, 22 April 1942

Deam, Charles C. 16 January 1930, 17 July 1937, 6 February 1941, 28 July 1941, 4 October 1937

Degener, Otto 16 March 1935

Demaree, Delzie 3 November 1935, 17 November 1938

Descole, Horacio R. July 1937

Detling, LeRoy E. 30 July 1940

Eastwood, Alice 12 November 1932, 9 April 1936

Epling, Carl 18 December 1928, 28 February 1930, 14 July 1933, 4 January 1937, 21 May 1937, 3 June 1937, 17 January 1941