Letter to William Sydney Thayer, (January 8, 1907 ?)
Letter to Jennette Osler, January 23(?), 1878
Letter to Lewellys Franklin Barker, (February 2, 1906 ?)
Letter to James William White, (February 2, 1906 ?)
Letter to Henry Phipps, May 10, 1907
Letter to Katharine Stone Crowell Cushing, April 15, 1913
Letter to Katharine Stone Crowell Cushing, May 2, 1913
Letter to Charles Ferdinand Martin, July 15, 1904
Letter to Henry Vining Ogden, July 15, 1904
Letter to Henri Amédée Lafleur, May 6, 1903