List of sources:
Alfred Dryden Tudhope. Geni. Retrieved on 8 March 2021 from https://www.geni.com/people/Alfred-Tudhope/6000000019817373225
British 1820 Settlers to South Africa. Transcribed marriage entries for Tudhope. Retrieved on 8 March 2021 from https://www.1820settlers.com/genealogy/settlerbrowsemarrs.php?name=TUDHOPE
Cape of Good Hope. Report of the Surveyor-General, 1886.
Cape Society of Civil Engineers. Minutes of Proceedings, 1903-1907, Vol. 1-5; 1909-1910, Vol. 7-8: Lists of members and office bearers.
Heese, J.A. South African genealogies. Pretoria and Stellenbosch, 1986-2005.
Men of the times: Old colonists of the Cape Colony and Orange River Colony. Johannesburg: Transvaal Publishing Co., 1906.
National Automated Archival Information Retrieval System (NAAIRS). http://national.archives.gov.za/naairs.htm Documents relating to Tudhope, Alfred Dryden /Tudhope, A.D.
South African Association for the Advancement of Science. Report, 1903, 1905/6, 1908, 1910: Paper by Tudhope and lists of members.
South African Society of Civil Engineers. Minutes of Proceedings, 1913, Vol. 11.
South African who's who, 1908, 1927/8, 1933.
Union of South Africa. Public service list, 1914.
University of the Cape of Good Hope. Calendar, 1884/5.