Letter from Donald McEchern to Wilder Penfield, July 13, 1934.
Letter from Dorothy McMurray to Wilder Penfield, October 2, 1933.
Letter from Dorothy McMurray to Wilder Penfield, September 28, 1933.
Letter from Douglas Abbott to Wilder Penfield, November 12, 1946.
Letter from Douglas Abbott to Wilder Penfield, November 28, 1946.
Letter from Dr. Alfred Stengel to Wilder Penfield, November 9, 1931.
Letter from Dr. Meakins to Wilder Penfield, January 26, 1928.
Letter from E. Harry Botterell to Wilder Penfield, December 14, 1942.
Letter from E. Harry Botterell to Wilder Penfield, February 6, 1941.
Letter from E. Harry Botterell to Wilder Penfield, November 24, 1942.
Letter from E.W. Beatty to Wilder Penfield, September 10, 1934.
Letter from Edgar Adrian to Wilder Penfield, October 1, 1934.
Letter from Edith M. Sheppard to Wilder Penfield, October 26, 1946.
Letter from Edward Archibald to Wilder Pemfield, December 20, 1927.
Letter from Edward Archibald to Wilder Penfield, August 9, 1927.