List of sources:
Bayer, A.W. Aspects of Natal's botanical history. South African Journal of Science, 1971, Vol. 67(8), pp. 401-411.
Brain, C.K. Austin Roberst. A lifelong devotion to South Africa's birds and beasts. Cape Town: John Voelcker Bird Book Fund, 1998.
FamilySearch: George Fox Fannin. https://www.familysearch.org/tree/person/details/GHJ2-DZT
George Fox Fannin. eGGSA library, at http://www.eggsa.org/library/main.php?g2_itemId=1761800
(photo of his gravestone).
Gunn, M. & Codd, L.E. Botanical exploration of southern Africa. Cape Town: Balkema, 1981.
Harvey, W.H. & Sonder, O.W. Flora Capensis (Vol. 3, Preface). Ashford, Kent: Lovell Reeve, 1894 (originally published 1865).
McCracken, D.P. & McCracken, P.A. Natal, the Garden Colony. Sandton: Frandsen, 1990.
Spencer, S.O. (ed.) British settlers in Natal, 1824-1857 (Vol. 6). Pietermarizburg: University of Natal Press, 1992.