List of sources:
Cape of Good Hope almanac and annual register... (title varies). Cape Town, 1857, p. 302; 1865, pp. 89-90; 1886, pp. 109-112: lists of admitted land surveyors.
Cape of Good Hope. Civil service list, 1887-1895.
Cape of Good Hope. Report of the committee of the Albany Museum, 1886.
Cape of Good Hope. Report of the Millwood (Knysna) Gold Commission. Parliamentary Report G47-87, 1887, by G. Shepstone, P. Fletcher and T. Bain.
Fletcher family archive.
The Jura, Scotland-Southern African Branch. http://fletcher-jura-africa.co.za/docs/fletcher-eaglesim-bio.html Retrieved on 21 November 2016.
Hall, A.L. A bibliography of South African geology to the end of 1920. Pretoria: Geological Survey, Memoir No. 18, 1922 (items no. 752, 756, 760, 767, 773).
Heese, J.A. South African genealogies. Pretoria and Stellenbosch, 1986-2005.
Mendelssohn, S. South African bibliography. London, 1910.
National Automated Archival Information Retrieval System (NAAIRS). http://www.national.archives.gov.za/naairs.htm Documents relating to Fletcher, Patrick/Fletcher, P.
Ross, G.L.D. Patrick
Fletcher, 1827-1897: First engineering geologist? Retrieved from http://fletcher-jura-africa.co.za/docs/P-FLET-1.html on 21 November 2016.
South African who's who, 1908, 1919/20, entries for Patrick Jnr and Robert Alexander Fletcher.
Standard Encyclopaedia of Southern Africa, 1970-1976, Vol. 10, p. 231.