List of sources:
Barberton Herald, 29 June 1888: Science and Literature.
Barberton Scientific and Literary Society. Proceedings, July 1888 - March 1889.
Gold Fields News, 27 June 1888: Scientific and Literary Society.
Gold Fields Times, 7 June 1887: Government Notice: Sanitary Board.
Henry Ryle Shaw. Retrieved from https://www.ashefamily.info/ashefamily/4576.htm on 5 October 2020.
Natal [Colony]. Report of the Commissioner of Agriculture, 1898.
Natal civil service list, 1906.
Natal who's who. Durban, 1906.
National Automated Archival Information Retrieval System (NAAIRS). http://national.archives.gov.za/naairs.htm Documents relating to Shaw, Henry Ryle / Shaw, H. Ryle / Shaw, H.R.
Plug, C. Early scientific and professional societies in the Transvaal: Barberton 1887-1889. South African Journal of Cultural History, 1990, Vol. 4(3), pp. 190-199.