Letter from the Eastman Kodak Company to James Preston Robb, December 26, 1945.
Letter from W.H. Kippen to Wilder Penfield, April 1945.
Letter from Wilder Penfield to A. Grant Fleming, March 27, 1940.
Letter from Wilder Penfield to A.A. Hodgson, March 27, 1940.
Letter from Wilder Penfield to Arthur Childe, January 23, 1940.
Letter from Wilder Penfield to Arthur E. Childe, January 10, 1941.
Letter from Wilder Penfield to Bill Stewart, July 31, 1940.
Letter from Wilder Penfield to Bill Stewart, September 16, 1940.
Letter from Wilder Penfield to Boris Babkin, March 27, 1940.
Letter from Wilder Penfield to Brooke Claxton, December 18, 1946.
Letter from Wilder Penfield to C.E. Cross, July 11, 1941.
Letter from Wilder Penfield to C.E. Cross, July 15, 1941.
Letter from Wilder Penfield to C.E. Cross, June 11, 1940.
Letter from Wilder Penfield to C.E. Cross, March 2, 1940.
Letter from Wilder Penfield to C.E. Cross, March 21, 1940.