These two borehole were sunk by the Minnaar-Witbank Colliery during February 1936.
Reference:
Hall, P. 1936. Analyses of samples from boreholes 2 and 3 on "Bankfontein 503" near Uitkyk, Transvaal. http://hdl.handle.net/10204/13033 .
Hall, P. (1936). Analyses of samples from boreholes 2 and 3 on "Bankfontein 503" near Uitkyk, Transvaal Retrieved from http://hdl.handle.net/10204/13033
Hall, PE Analyses of samples from boreholes 2 and 3 on "Bankfontein 503" near Uitkyk, Transvaal. 1936. http://hdl.handle.net/10204/13033
Hall P. Analyses of samples from boreholes 2 and 3 on "Bankfontein 503" near Uitkyk, Transvaal. 1936 [cited yyyy month dd]. Available from: http://hdl.handle.net/10204/13033