Letter to William Sydney Thayer, 1892
Letter to William Raphael, February 7, 1885(?)
Letter to William Raphael, 1886(?)
Letter to William Pepper, October 3, 1888
Letter to William Osler, September 4, 1904
Letter to William Osler, September 4, 1904
Letter to William Osler, November 8, 1908
Letter to William Osler, November 11, 1894(?)
Letter to William Osler, May 11, 1891
Letter to William Osler, March 6, 1915