Letter, 8 July 1870
Letter, 11 July 1872
Letter, 1 June 1874
Letter, 13 January 1876
Letter, 15 June 1876
Letter, 5 May 1878
Letter, 8 September 1878
Letter, 26 September 1883
Letter, 14 November 1883
Letter from Museum Committee of Peter Redpath Museum, 10 December 1907