List of sources:
Cape of Good Hope. Report of the committee of the Albany Museum, 1895, 1901.
Cape of Good Hope. Report on Gill College Museum, 1875.
Cape of Good Hope. Report on the Graaff-Reinet botanic gardens, 1878-1880.
Doidge, E.M. South African fungi and lichens to the end of 1945. Bothalia, 1950, Vol. 5, pp. 1-1094 (see p. 36).
FamilySearch: William Tuck. https://ancestors.familysearch.org/en/GDL4-4JD/william-tuck-1824-1912
Grahamstown and Albany Horticultural Society. First show, 1897. (G.M. Bowker Museum, Grahamstown).
Grahamstown Journal, 24 May 1867, p. 2, Botanic Garden.
Gunn, M. & Codd, L.E. Botanical exploration of southern Africa. Cape Town: Balkema, 1981.
Henning, C.G. A cultural history of Graaff-Reinet (1786-1886). Doctoral thesis, University of Pretoria, 1971.
McCracken, D.P. & McCracken, E.M. The way to Kirstenbosch. Cape Town: National Botanic Gardens (Annals of the Kirstenbosch Gardens, Vol. 18), 1988.
Schönland, S. Grahamstown orchids. E.P. Magazine, 1892, Vol. 1(1), pp. 27-29.
Webber, H.J. A comparative study of the citrus industry in South Africa. Department of Agriculture, Bulletin No. 6, 1925.