Letter to William Osler, August 1880
Letter to Henry Vining Ogden, May 15, 1882
Letter to Henry Vining Ogden, April 16, 1882
Letter to Roswell P. Park, April 10, 1882
Letter to Henry Vining Ogden, October 25, 1882
Letter to Harvey Cushing, September 2, 1920
Letter to Henry Vining Ogden, December 27, 1883
Letter to Edward A. Sharpey Schäfer, November 10, 1883
Letter to Henry Vining Ogden, July 13, 1883
Letter to Henry Vining Ogden, November 10, 1883