Letter, 26 November 1855
Letter, 1 December 1855
Letter, 8 December 1855
Letter, 25 March 1856
Letter, 5 April 1889
Letter, 23 April 1889
Preliminary notes on new species of sponges from the Quebec group at Little Métis
Letter, 11 September 1880
Letter, 2 July
Letter, July 1890