List of sources:
FamilySearch: Millicent Franks. https://www.familysearch.org/ark:/61903/3:1:33S7-9T7B-9F9R?view=index&personArk=/ark:/61903/1:1:KFN3-6LB&action=view and https://www.familysearch.org/tree/person/details/LBSJ-76T and https://www.familysearch.org/ark:/61903/1:1:QVCG-CYX9
Gunn, M. & Codd, L.E. Botanical exploration of southern Africa. Cape Town: Balkema, 1981.
McCracken, D.P. A new history of the Durban Botanic Gardens. Durban: Parks Department, 1996.
The Naturalist (Durban), 1911, Vol. 1, Numbers 3, 5 and 6: Council of the Natal Scientific Society, and paper by Wood and Franks.
Schrire, B.D. Centenary of the Natal Herbarium, Durban, 1882-1982. Bothalia, 1983, Vol. 14(2), pp. 223-236.