Gunnislake Clitters copper, tin, arsenic and wolfram mine
Final ore dressing and concentration, and arsenic production, were sited over the lower slope behind the early phase adit. Extensive remains from this phase survive in both areas. Skinner's Shaft itself, eventually sunk to over 500m deep, is enclosed by a rectangular rubble wall with dressed quoins. In 1862 1864, steam engines were installed for pumping, winding and ore crushing, in engine

































