Letter to Yale University Press, November 20, 1913
Letter to A. B. Macallum, August 13, 1897
Letter to A. Frederick Bradshaw, December 24, 1918
Letter to A. Frederick Bradshaw, January 31, 1919
Letter to A. Frederick Bradshaw, July 24, 1919
Letter to A. Frederick Bradshaw, July 24, 1919
Letter to A. Frederick Bradshaw, October 20, 1918
Letter to A. Lawrence Lowell, April 3, 1915
Letter to A. Lawrence Lowell, March 31, 1916
Letter to A. Lawrence Lowell, September 17, 1915