List of sources:
Dictionary of South African biography, Vol. 3, 1977.
Fisher, R. Land surveyors and land tenure at the Cape, 1657-1812. In C.G.C. Martin & K.J. Friedlaender (eds), History of surveying and land tenure in South Africa, collected papers, Vol. 1, pp. 55-88. Cape Town: UCT Department of Surveying, 1984.
Heese, J.A. South African genealogies. Pretoria and Stellenbosch, 1986-2005.
Koeman, C. Nieuwe bijdragen tot de kennis van Zuid-Afrika's historische kartografie. Tijdschrift van het Koningklijk Nederlands Aardrijkskundig Genootschap, 1952, Vol. 69, pp. 73-95.