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. Journal, 1904/5, Vol. 5, Members.
National Archives Repository (TAB), Source MHG, Vol. 0, Ref. 3421/40: death notice, Harry William Miller.
Orr, J. Presidential address. Associated Scientific and Technical Societies of South Africa, Annual Proceedings, 1938, pp. 15-86.
South African Association for the Advancement of Science. Report, 1903, 1905/6, 1910.
South African Association of Engineers (and architects). Proceedings, 1892-1894, Vol. 1; 1898-1899, Vol. 4.