Letter to Harvey Cushing, April 20, 1920
Letter to William Osler, December 31, 1900
Letter to Harvey Cushing, July 8, 1920
Letter to William Osler, November 8, 1908
Letter to John S. Billings
Letter to John S. Billings
Letter to William Osler, December 14, 1898
Letter to William Osler, February 8, 1904
Letter to Henry Vining Ogden, December 31, 1884
Letter to Harvey Cushing, September 27, 1921