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.
Cape of Good Hope Government Gazette, 16 September 1862: List of medical practitioners in the Cape Colony.
Cape of Good Hope Meteorological Commission. Meteorological Report, 1862, p. 3 (National Library of South Africa, Cape Town, AZF 1987-2).
Cape Town Directory... (Cape Almanac), 1865, pp. 91-92: Medical practitioners; 1867, p. 79: Meteorological Commission.
Dr Alexander Karl Kuno
Theodor Graf. Geni, at https://www.geni.com/people/Dr-Alexander-Graf/6000000049613959901
as on 20 February 2017.
Liversidge, R. Edgar Leopold Layard, 1824-1900. Bokmakierie, 1957, Vol. 9, pp. 37-39.
National Automated Archival Information Retrieval System (NAAIRS). http://www.national.archives.gov.za/naairs.htm Documents relating to Alexander Graf / Dr Graf.