Letter from Robert A. Lambert to Wilder Penfield, July 6, 1934.
Letter from Robert C. Bates to Wilder Penfield, November 10, 1959.
Letter from Robert S. Morison to Wilder Penfield, March 3, 1953.
Letter from Robert S. Morison to Wilder Penfield, May 4, 1953.
Letter from Robert S. Morison to Wilder Penfield, October 21, 1952.
Letter from S.R. Russell (Comptroller, McGill University) to Wilder Penfield, April 29, 1930.
Letter from Sir Arthur Currie to Louis-Alexandre Tashereau, October 1, 1931.
Letter from Sir Arthur Currie to Wilder Penfield, August 17, 1932.
Letter from Sir Arthur Currie to Wilder Penfield, August 29, 1932.
Letter from Sir Arthur Currie to Wilder Penfield, August 31, 1933.
Letter from Sir Arthur Currie to Wilder Penfield, September 24, 1932.
Letter from Sir Charles Sherrington to Wilder Penfield, March 4, 1934.
Letter from Sir E.W. Beatty to Wilder Penfield, April 2, 1934.
Letter from Sir E.W. Beatty to Wilder Penfield, July 24, 1934.
Letter from Sir Henry Dale to Wilder Penfield, August 23, 1959.