Letter to Brooks, December 10, 1912
Letter to Burleigh, December 24, 1912
Letter to Bushnell, February 12, 1906
Letter to Chairman & Council of the British Medical Assoc., June 19, 1914
Letter to Coles, April 24, 1915
Letter to Colophon Club, July 29, 1919
Letter to Dear Doctor, October 1, 1901
Letter to Editor of the London Times, August 13, 1913
Letter to Editor of the London Times, June 19, 1915
Letter to Editor of the New York Sun, June 16, 1908