Letter, 16 August 1869
Letter, 18 January 1883
Letter, 13 February 1885
Letter, 13 February 1885
Letter, 4 February 1882
Letter, 20 February 1886
Letter, 3 February 1887
Letter, 6 March 1888
Letter, 7 September 1889
Letter, 7 December 1889
Letter, 6 March 1890