Letter to Editor of the New York Sun, June 16, 1908
Letter to Editor of the Spectator, November 4, 1911
Letter to Editor of The Times, August 27, 1914
Letter to Editor of the Times, February 9, 1911
Letter to Editor of the Times, January 15, 1915
Letter to Editor of the Times, July 18, 1919
Letter to Editor of the Times, November 29, 1918
Letter to Elliott, April 9, 1918
Letter to Fearnside, January 26, 1915
Letter to Fisher, March 16, 1912