List of sources:
Barberton Scientific and Literary Society. Proceedings, October 1889, pp. 1-10, paper by Galpin.
Burtt-Davy, J. & Leendertz, R. First annotated catalogue of the vascular plants of the Transvaal and Swaziland. Report of the South African Association for the Advancement of Science, 1908, pp. 230-236.
Cape of Good Hope. Report of the Colonial Botanist, 1900.
Cape of Good Hope. Report of the committee of the Albany Museum, 1887, 1894, 1895, 1899, 1900, 1902, 1903, 1905-1913.
Cape of Good Hope. Report of the trustees of the South African Museum, 1906.
Dictionary of South African biography, Vol. 2, 1972.
FamilySearch: Ernest Edward Galpin. https://www.familysearch.org/ark:/61903/3:1:3Q9M-CS9G-H817?view=index&personArk=/ark:/61903/1:1:QP74-N5H8&action=view and https://www.familysearch.org/tree/person/details/GSYC-76W
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. Cape Town: Balkema, 1981.
In Memoriam: Ernest Edward Galpin, DSc, FLS. South African Journal of Science, 1941, Vol. 38, p. xix.
Killick, D.J.B. Fifty years of plant ecology in South Africa. Journal of the South African Biological Society, 1966, Vol. 7, pp. 11-28.
The late Dr Galpin. Journal of the South African Forestry Association, 1941, No. 7, pp. 2-3.
National Automated Archival Information Retrieval System (NAAIRS). http://www.national.archives.gov.za/naairs.htm Documents relating to Ernest Edward Galpin / E.E. Galpin.
Obituary: Ernest Edward Galpin. Journal of South African Botany, 1942, Vol. 8, pp. 197-199.
Phillips, E.P. A brief historical sketch of the development of botanical science in South Africa and the contribution of South Africa to botany. South African Journal of Science, 1930, Vol. 27, pp. 39-80.
Phillips, E.P. Memories of South African botanists. South African Journal of Science, 1965, Vol. 61, pp. 291-294.
Plug, C. Early scientific and technical societies in the Transvaal: Barberton 1887-1889. South African Journal of Cultural History, 1990, Vol. 4(3), pp. 190-199.
Roux, J.P. Swaziland ferns and fern allies. Pretoria: Southern African Botanical Diversity Network Report No. 19, 2003.
Royal Society of South Africa. Transactions, 1908-1910, Vol. 1 and 1917, Vol. 6, lists of members; 1936, Vol. 23, paper by Galpin.
South African Association for the Advancement of Science. Report, 1903, 1904, 1905/6, 1908, 1910, 1918: Lists of members and office bearers.
South African Philosophical Society. Transactions, 1906-1907, Vol. 16 and 17: Lists of members.
South African who's who, 1908.
Thiselton-Dyer, W.T. (ed.) Flora Capensis, preface to Vol. 6 (1897) and Vol. 5.1 (1912).