Letter, 31 May 1888
Letter, 23 March 1881
Letter, 11 November 1892
Letter, 31 May 1881
Letter, 8 August 1894
Letter, 30 March 1881
Letter, 11 November 1874
Letter, 17 November 1874
Letter to Harvey Cushing, May 4, 1926
Letter to Harvey Cushing, May 4, 1926
Letter, 9 November 1875