Letter, 13 March 1886
Letter, 8 March 1886
Letter, 1 August 1889
Letter, 16 July 1894
Letter, 25 July 1894
Letter, 12 September 1885
Notes on the geology and fossil flora of Prince Edward Island
Letter, 16 September 1882
Letter, 25 June 1889
Letter, 16 July 1889