Gongo Soco Wikipedia
Gongo Soco was a gold mine in the state of Minas Gerais, Brazil, to the east of Belo Horizonte in the mid19th century. It was worked by skilled miners from Cornwall and by less skilled Brazilian labourers and slaves. Machinery powered by a water wheel and a steam engine was used to pump out the mine, operate the lifts, and operate the grinding mills where the gold was separated from the ore.