Transactions of the Royal Geological Society of Cornwall, Vol.4 p70 - 94
| On the state of our Tin Mines at different periods until the commencement of the Eighteenth Century, J Hawkins, [Read October, 1830], IV: 70-94. |
| On the state of our Tin Mines at different periods until the commencement of the Eighteenth Century, J Hawkins, [Read October, 1830], IV: 70-94. |