Letter, 21 April 1870
Letter, 26 May 1870
Letter, 30 June 1870
Letter from Edinburgh, June 1870
Letter, 3 August 1870
Letter, 11 January 1871
Letter, 11 January 1871
Letter, January 1871
Letter, 4 October 1883
Letter, 7 November 1883
Letter, 21 and 22 November 1883