Letter from Wilder Penfield to Harold L. Fetherstonhaugh, July 5, 1944.
Letter from Wilder Penfield to J.C. Mackenzie, September 28, 1944.
Letter from Wilder Penfield to J.C. McKenzie, September 19, 1945.
Letter from Wilder Penfield to J.C. Meakins, January 8, 1945.
Letter from Wilder Penfield to J.C. Meakins, May 20, 1942.
Letter from Wilder Penfield to J.W. McConnell, March 27, 1940.
Letter from Wilder Penfield to James Bordley, July 15, 1941.
Letter from Wilder Penfield to James Bordley, June 18, 1941.
Letter from Wilder Penfield to John Kershman, June 14, 1944.
Letter from Wilder Penfield to Jonathan C. Meakins, June 27, 1944.
Letter from Wilder Penfield to Lt.Col. W. Leggat, September 5, 1945.
Letter from Wilder Penfield to Major E.H. Botterell, March 26, 1941.
Letter from Wilder Penfield to Mary Roach, September 16, 1940.
Letter from Wilder Penfield to N.R. Anderson, January 2, 1942.
Letter from Wilder Penfield to Ross Millar, December 14, 1942.