Letter to William Osler, September 29, 1913
Letter to William C. Gorgas, March 14, 1914
Letter to John Young Walker MacAlister, (ca May 20, 1914)
Letter to Henry Barton Jacobs, June 30, 1914
Letter to William Osler, July 5, 1914
Letter to Arthur Thomson, February 1, 1904
Letter to William Osler, December 1904
Letter to William Osler, November 20, 1914
Letter to William Osler, March 11, 1915
Letter to John George Adami, May 13, 1915