Letter to William Pepper, October 3, 1888
Letter to Henry Vining Ogden, October 12, 1888
Letter to Daniel Coit Gilman, January 25, 1889(?)
Letter to Daniel Coit Gilman, 1889(?)
Letter to Henri Amédée Lafleur, March 12, 1889
Letter to Henri Amédée Lafleur, April 8, 1889
Letter to Daniel Coit Gilman, May 1, 1889
Letter to Harvey Cushing, April 20, 1921
Letter to Harvey Cushing, July 7, 1921
Letter to Harvey Cushing, June 30, 1920