List of sources:
Ancestry.com, at http://records.ancestry.com . Search for Frederick Gordon Cawston.
Barnard, K.H. Personal names in South African conchology. Cape Town: Conchological Society of Southern Africa, Special Publication No. 4, 1965.
Google scholar. http://scholar.google.co.za/ , publications by F.G. Cawston.
Malan, M. In quest of health: The South African Institute for Medical Research, 1912-1973. Johannesburg: Lowry, 1988.
Medical, Dental and Pharmacy Directory of South Africa, 1926-1927. Pietermaritzburg: Ewald Herbert, 1926.
National Automated Archival Information Retrieval System (NAAIRS), at http://www.national.archives.gov.za/naairs.htm Documents relating to Cawston, F.G. / Cawston, Frederick Gordon.
Pietermaritzburg Archives Repository (NAB). Volume NMC 34. List of medical practitioners, etc., registered in the Cape Province, 31 December 1915.
South African Association for the Advancement of Science. Report, 1916, paper by Cawston; 1918, list of members.
South African Journal of Natural History, 1919, Vol. 1(1), pp. 274-277, Members [of the South African Biological Society]; 1920-1921, Vol. 2 and 3, papers by Cawston.
South African Journal of Science, 1918-1936, Vol. 15, 16, 19, 20, 24, 28, 29, 32 and 33, papers by Cawston.
South African Who's Who, 1923/4 to 1946.
Transactions of the Royal Society of South Africa, 1921-1934, Vol. 9, 11, 12, 13, 18, and 22, papers by Cawston.
WorldCat, at http://www.worldcat.org