Letter to Unidentified, September 1902
Letter to C.N.B. Camac, August 28, 1922
Cushing's notes, December 1903
Correspondence, notes on books, and miscellaneous, January-June 1904
Correspondence, notes on books, and miscellaneous, January-June 1904
Letter to Mr. Provost, December 10, 1903
Letter to Arthur Thomson, January 11, 1904
Letter to Arthur Thomson, February 1, 1904
Letter written by W.S. Church and others, February 17, 1904
Letter to Sir John Burdon Sanderson, May 13, 1904
Review article, March 4, 1905