Letter, 23 December 1875
Letter, 16 April 1887
Copy of letter, 29 October 1884
Copy of letter, 11 December 1888
Copy of letter, 26 November 1888
Copy of letter, 21 April 1882
Memo, 5 December 1887
Copy of letter, 20 November 1888
Copy of letter, 15 April 1882
Copy of letter, 13 November 1889