List of sources:
Burrows, E.H. A history of medicine in South Africa up to the end of the nineteenth century. Cape Town: Balkema, 1958.
FamilySearch: George Graves Eyre. https://www.familysearch.org/ark:/61903/3:1:33S7-956Q-QK1?view=index&personArk=/ark:/61903/1:1:Q2QM-DV7Z&action=view and https://www.familysearch.org/ark:/61903/1:1:QGYD-CV32 and https://www.familysearch.org/ark:/61903/1:1:6NS6-XYBC
Gilder, S.S.B. South African medicine in the 1890s. South African Medical Journal, special issue, 29 June 1983, pp. 4-7.
Medical and pharmacy register for the Colony of the Cape of Good Hope, 1893, 1907.
National Automated Archival Information Retrieval System (NAAIRS). http://www.national.archives.gov.za/naairs.htm Documents relating to Eyre, George Graves/Eyre, George G.
National Union Catalogue, pre-1956 imprints. London: Mansell, 1968-1980.
South African Medical Directory for 1897. Cape Town: Cape Times, 1897.
South African Medical Journal (second series), December 1895, p. 235: list of members of the Cape of Good Hope Branch of the BMA; January 1898, Vol. 5, pp. 240-242: list of members of the South African Medical Association.
University of the Cape of Good Hope. Calendar, 1880.
Venter, R.J. Bibliography of regional meteorological literature. Vol. 1. Southern Africa, 1486-1948. Pretoria: Weather Bureau, 1949.