List of sources:
Bloemfontein Debating Society. Inaugural address, delivered by the Chairman, Mr. Justice Buchanan... (Addendum, pp. 13-14). Bloemfontein, 1877.
Cape of Good Hope. Report of the Meteorological Commission, 1880-1897.
Dictionary of South African biography, Vol. 1, 1968.
FamilySearch: John Brebner. https://www.familysearch.org/search/record/results?q.anyDate.from=1833&q.givenName=John&q.surname=Brebner
History of meteorology in South Africa. Weather Bureau Newsletter, 1960, No. 139, 48pp.
Lyle, J. Meteorology: past, present and future work in the Orange River Colony. Transactions of the Philosophical Society of the Orange River Colony, 1903-1907, Vol. 1, pp. 20-23.
National Automated Archival Information Retrieval System (NAAIRS). http://www.national.archives.gov.za/naairs.htm Documents relating to J. Brebner.
Oberholzer, J.J. National Museum centenary. Southern African Museums Association Bulletin (SAMAB), 1977, Vol. 12, pp. 254-263.
University of the Cape of Good Hope. Calendar, 1875, 1884/5, 1917/8.