List of sources:
FamilySearch: Alexander Mair. https://ancestors.familysearch.org/en/LDY8-QYK/alexander-mair-1842-1895
Liebenberg, E.C. Die topografiese kartering van Suid-Afrika, 1879-1972; 'n histories-geografiese ontleding. MA-verhandeling in Geografie, Universiteit van Suid-Afrika, 1973.
Liebenberg, E. From Barrow to Jeppe - the development of 19th century cartography in South Africa. In E. Liebenberg (ed.), Proceedings of the symposium on the history of cartography of Africa... (pp. 103-119). Pretoria: International Cartographic Association, 2003.
Mair, Alexander. South African Settlers. Retrieved from http://www.southafricansettlers.com/?cat=23&paged=24
on 2018-8-15.
Maps of Natal and Zululand. Natalia, 1972, Vol. 2, pp. 34-35.
Natal almanac, directory and yearly register, 1870, 1872, 1880, 1890: Land surveyors.
National Automated Archival Information Retrieval System (NAAIRS). http://www.national.archives.gov.za/naairs.htm Documents relating to Mair, Alexander.
Reitz, O.G. August Hammar, 1856-1931. South African Survey Journal, 1968, Vol. 11(4), pp. 31-38 and Vol. 11(5), pp. 36-45.