Transactions of the Royal Geological Society of Cornwall, Vol.4 p492 - 496
| An Account of the Produce of the Copper Mines of Cornwall in Ore, Copper, & Money, in the years ending 30th June 1828-1832, IV: 492-496. |
| An Account of the Produce of the Copper Mines of Cornwall in Ore, Copper, & Money, in the years ending 30th June 1828-1832, IV: 492-496. |