List of sources:
Chemical and Metallurgical Society of South Africa. Proceedings, 1897-1899, Vol. 2, List of members.
Journal of the Chemical, Metallurgical and Mining Society of South Africa, 1904-1906, Vol. 5-6.
National Automated Archival Information Retrieval System (NAAIRS). http://www.national.archives.gov.za/naairs.htm Documents relating to Burnett, Digby Vere / Burnett, Hilda Flora Annette.
National Archives Repository (TAB), Source MHG, Vol. 0, Ref. 8283/58: Death notice, Digby Vere Burnett.
Sir Digby Vere Burnett. http://www.gritquoy.com/genealogy/getperson.php?personID=I140449&tree=001Master
South African who's who, 1923/4, 1927/8, 1933, 1936, 1939, 1944, 1946, 1950, 1951.
Who was who, Vol. 5, 2nd ed. London: Adam & Black, 1964.