Letter, 4 June 1919
Letter, 23 June 1918
Letter to William Osler, October 14, 1918
Letter to William Osler, August 19, 1918
Letter to William Osler, November 30, 1918
Letter to William Osler, December 19, 1918
Letter to William Osler, April 20, 1917
Letter to Simon Flexner, April 20, 1917
Letter to Flexner, April 24, 1917
Letter to William Osler, January 28, 1916