Leighton, James (1918). "Some suitable materials for paper-making". Report of the Fifteenth Annual Meeting of the South African Association for the Advancement of Science. Cape Town: S2A3: 286. Retrieved 27 October 2017.
Webb, Denver Arnold (1993). King William's town during the South African War, 1899-1902 : an urban, social, economic and cultural history (Masters). Rhodes University. hdl:20.500.11892/25546.