Letter from Wilder Penfield to Edward Archibald, June 30, 1927.
Letter from Wilder Penfield to Edward Archibald, November 10, 1927.
Letter from Wilder Penfield to Edward Archibald, September 16, 1927.
Letter from Wilder Penfield to Edward Beatty, March 27, 1940.
Letter from Wilder Penfield to Emma M. Abbett, March 10, 1928.
Letter from Wilder Penfield to Francis McNaughton, January 26, 1960.
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.
Letter from Wilder Penfield to Frank Cyril James, July 13, 1944.
Letter from Wilder Penfield to Frank Cyril James, July 31, 1945.