List of sources:
British Association for the Advancement of Science. Report of the seventy-fifth meeting, South Africa, 1905. London: John Murray, 1906.
Dictionary of South African biography (E.E. Galpin), Vol. 2, 1972.
FamilySearch: Maria Elizabeth de Jongh. https://www.familysearch.org/search/record/results?q.anyDate.from=1859&q.anyPlace=South Africa&q.givenName=Marie Elizabeth&q.recordCountry=South Africa&q.surname=Galpin
Gilliland, H.B. On the history of plant study upon the Witwatersrand. Journal of South African Botany, 1953, Vol. 19, pp. 93-104.
Gunn, M. & Codd, L.E. Botanical exploration of southern Africa (E.E. Galpin). Cape Town: Balkema, 1981.
Heese, J.A. South African genealogies. Pretoria and Stellenbosch, 1986-2005.
Obituary: Ernest Edward Galpin. Journal of South African Botany, 1942, Vol. 8, pp. 197-199.