Letter from Brooke Claxton to Wilder Penfield, December 27, 1946.
Letter from C.E. Cross to Warrant Officers, October 21, 1940.
Letter from C.E. Cross to Wilder Penfield, April 1, 1940.
Letter from C.E. Cross to Wilder Penfield, April 2, 1941.
Letter from C.E. Cross to Wilder Penfield, April 29, 1940.
Letter from C.E. Cross to Wilder Penfield, April 29, 1940.
Letter from C.E. Cross to Wilder Penfield, August 5, 1940.
Letter from C.E. Cross to Wilder Penfield, July 19, 1941.
Letter from C.E. Cross to Wilder Penfield, June 1, 1940.
Letter from C.E. Cross to Wilder Penfield, June 28, 1940.
Letter from C.E. Cross to Wilder Penfield, June 5, 1941.
Letter from C.E. Cross to Wilder Penfield, June 6, 1940.
Letter from C.E. Cross to Wilder Penfield, March 23, 1940.
Letter from C.E. Cross to Wilder Penfield, May 20, 1940.
Letter from C.E. Cross to Wilder Penfield, November 17, 1940.