Letter to William Osler, January 4, 1918
Letter to William Osler, January 23, 1918
Letter to William Osler, January 31, 1918
Letter to William Osler, April 2, 1918
Letter to William Osler, July 27, 1918
Letter to William Osler, July 29, 1918
Letter to William Osler, September 7, 1918
Letter to John Collins Warren, October 19, 1918
Letter to William Osler, January 28, 1919
Letter to William Osler, May 8, 1919