Letter, 20 June
Letter, 15 December 1870
Letter, 20 and 24 November 1870
Letter, 6 and 9 November 1870
Letter, 23 October 1870
Letter, 12 and 13 October 1870
Letter, 3 December 1871
Letter, 17 December 1871
Letter, 10 December 1871
Letter, 26 June 1870