History of Johannesburg Wikipedia
After the Great Trek European pastoralists also started settling in the Transvaal. Some of them chose to farm where Johannesburg was to rise later. Each burgher (citizen) was entitled to at least one farm, measuring 1500 morgen or about 3100 acres. The first recorded discovery of gold on the Witwatersrand was made by Jan Gerrit Bantjes in June 1884, on the farm Vogelstruisfontein.