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
Letter to William Osler
Letter to Lawrence C. Wroth, April 16, 1913
Letter to Katharine Stone Crowell Cushing, May 2, 1913