Letter, 26 September 1863
Letter, 4 June 1919
Letter, 13 September 1920
Letter, 25 December 1925
New Stephanidae from Borneo and the Philippine Islands
New Stephanidae from Borneo and the Philippine Islands
Receipt from R.S. Robertson, 14 July 1843
Receipt from R.S. Robertson, 14 July 1843
Letter, 3 March 1879
Order, 2 June 1856
Atlantic Black Journal, volume 1, number 4 (October 1973)
Atlantic Black Journal, volume 1, number 4 (October 1973)
Ebony Express, volume 2, number 9 (October 1980)
Ebony Express, volume 2, number 9 (October 1980)