Date: 1874
Wheal Raven Mine appears to have been worked a little before the memory of any of the present generation, and subsequently stopped; but about the year 1820, the mine was again set to work.  I think their first appliance for drawing the water fiom the shaft was by attaching a crank to the water wheel stamps axle, and a rod from that to the shaft; then they tried with a larger water wheel, but afterwards erected a steam pumping engine.  The sett extended east and west of the river.