Letter to Charles Nicoll Bancker Camac, December 15, 1906
Letter to John George Adami, December 15, 1906
Letter to Edward F. Milburn, December 16, 1906
Letter to Mrs. Charles Daniel Parfitt, December 20, 1906
Letter to Frederick T. Gates, May 2, 1907
Letter to John George Adami, (May 1907 ?)
Letter to John H. Musser, August 21, 1888
Letter to William Sydney Thayer, August 23, 1896(?)
Letter to John George Adami, July 1898
Letter to Daniel Coit Gilman, July 2, 1898