List of sources:
Cape of Good Hope. Report of the Trustees of the South African Museum, 1898.
Cape of Good Hope Government Gazette, 9 January 1885, pp. 41-45: List of licensed medical practitioners in the Cape Colony.
Dr Charles Edward Piers. The Beaumont Project, at http://www.beaumont-project.com/VanRyneveldFT/769.html as on 29 April 2020.
FamilySearch: Charles Edward Piers. https://www.familysearch.org/en/tree/person/details/MYKY-H9Z AND https://www.familysearch.org/ark:/61903/3:1:33S7-95D2-Q2V?view=index&personArk=/ark:/61903/1:1:Q2QM-DGHF&action=view&cc=1779109&lang=en&groupId=M96D-YRF
King William's Town Naturalist's Society. Minute book (Kaffrarian Museum, King William's Town).
Laidler, P.W. & Gelfand, M. South Africa: Its medical history, 1652-1898. Cape Town: Struik, 1971.
Medical and Pharmacy register for the Colony of the Cape of Good Hope, 1893, 1907.
National Automated Archival Information Retrieval System (NAAIRS). http://national.archives.gov.za/naairs.htm Documents relating to Piers, Charles Edward.
Ritchie, W. The history of the South African College (Vol. 2, List of alumni). Cape Town: T. Maskew Miller, 1918.
South African medical directory for 1897. Cape Town: Cape Argus, 1897.
South African Medical Journal (Series 2), December 1895, Vol. 3, p. 235: List of members of the Cape of Good Hope Branch of the British Medical Association.
University of the Cape of Good Hope. Calendar, 1884/5.