Letter to William Osler, November 25, 1915
Letter to William Osler, November 26, 19115
Letter to William Osler, September 5, 1916
Letter to William Osler, November 15, 1917
Letter to William Osler, November 26, 1917
Letter to William Osler, December 15, 1917
Letter to William Osler, December 31, 1917
Letter to William Osler, November 12, 1917
Letter to William Osler, January 4, 1918
Letter to William Osler, January 31, 1918