Transactions of the Royal Geological Society of Cornwall, Vol.4 p29 - 39
| A Description of Happy-Union Tin Stream Work at Pentuan, John W Colenso, [Read October, 1829], IV: 29-39, Illustrated with colour plate fold out. |
| A Description of Happy-Union Tin Stream Work at Pentuan, John W Colenso, [Read October, 1829], IV: 29-39, Illustrated with colour plate fold out. |