Letter to Roswell P. Park, April 10, 1882
Letter to Sigmund Adolphus Knopf, October 31, 1908
Letter to Thomas R. Boggs, June 12, 1909
Letter to William Osler, August 1880
Letter to William Osler, August 24, 1885
Letter to William Osler, August 24, 1885(?)
Letter to William Osler, (January 1915 ?)
Letter to William Osler, July 6, 1874
Letter to William Osler, November 12, 1914
Letter to William Osler, November 28, 1872