List of sources:
Chemical and Metallurgical Society of South Africa. Proceedings, 1897-1899, Vol. 2, list of members.
Chemical, Metallurgical and Mining Society of South Africa. Proceedings, 1902-1903, Vol. 3, list of members; Journal, 1904-1905, Vol. 5, list of members; Journal, 1912-1914, Vol. 13 and 14, papers by R. Dures.
National Automated Archival Information Retrieval System (NAAIRS), at http://www.national.archives.gov.za/naairs.htm Documents relating to Robert Dures.
University of the Cape of Good Hope. Calendar, 1893/4, 1917/8.