Letter, 17 May 1877
Letter, 24 June 1883
Letter, 24 January 1879
Letter, 7 March 1898
Letter, 26 February 1886
Letter, 24 February 1893
Letter, 27 October 1885
Letter, 27 October 1885
Postcard, 18 September 1880
Letter, 15 February 1883
Letter to Harvey Cushing, June 30, 1925
Letter to Harvey Cushing, June 30, 1925