List of sources:
Beolens, B., Watkins,
M. & Grayson, M. The eponym
dictionary of birds. Bloomsbury Publishing, 2014.
Cape of Good Hope. Report of the Trustees of the South African Museum, 1867, 1868.
Dictionary of South African biography (D.S.F.A. Phillips), Vol. 2, 1972.
FamilySearch: Albert Frederick Ortlepp. https://ancestors.familysearch.org/en/LC7V-JC8/albert-frederick-ortlepp-1840-1891
Heese, J.A. South African genealogies. Pretoria and Stellenbosch, 1986-2005.
Natal almanac, directory and yearly register, 1890, p. 387, Land surveyors.
National Automated Archival Information Retrieval System (NAAIRS). http://www.national.archives.gov.za/naairs.htm Documents relating to Ortlepp, Albert Frederick / Ortlepp, A.F.