Letter from Wilder Penfield to Colonel J.C. MacKenzie, August 4, 1944.
Letter from Wilder Penfield to David Keys, April 1, 1940.
Letter from Wilder Penfield to Donald McEachern, July 31, 1944.
Letter from Wilder Penfield to Douglas Abbott, December 18, 1946.
Letter from Wilder Penfield to Douglas Abbott, November 21, 1946.
Letter from Wilder Penfield to Douglas Abbott, October 22, 1946.
Letter from Wilder Penfield to E.B. Convery, May 23, 1942.
Letter from Wilder Penfield to Edward Beatty, March 27, 1940.
Letter from Wilder Penfield to Frank Cyril James, April 12, 1945.
Letter from Wilder Penfield to Frank Cyril James, August 8, 1945.
Letter from Wilder Penfield to Frank Cyril James, December 2, 1946.
Letter from Wilder Penfield to Frank Cyril James, February 11, 1943.
Letter from Wilder Penfield to Frank Cyril James, January 23, 1945.
Letter from Wilder Penfield to Frank Cyril James, January 8, 1945.
Letter from Wilder Penfield to Frank Cyril James, July 10, 1944.