Miscellaneous papers relating to mining matters, including a letter from John Wynne to Howell Lloyd at Havodynos [18th cent.] concerning the affairs of the Aled Level Mine; a memorial by C. B. Dyer, as agent of the Gwernymynydd Mines Company, to the lords of Mold, 31 March 1831, with regard to the drainage of mines and difficulties encountered in obtaining additional land for driving a deep level (addressed on the outside to the Rev[eren]d J[ohn] C[onway] Conway, Soughton, Northop); an agreement, 1848, whereby the Rev[eren]d Richard Howard of Llanrhaiadr yn Cinmerch, co. Denbigh, granted to David Evans of the parish of Llandudno, and Evan Evans, Edward Evans, John Jones and George John Newton, all of Liverpool, mineral rights on Trecastell farm in the parish of Llangelynin, co. Carnarvon (draft copy); an account of payments in respect of the Trawsfynydd Mine, 1815-1817; an account of the sale of coal and slack at Argoed Colliery [ ] for the half year ending 26 June 1824; notes on a speltre furnace; accounts between the Llandidno Mine Company and Messrs. Roe and Company, smelters of copper ore, 1793-1801; two accounts - the Llandidno New Mine Co. in account with the proprietor of Mona mine in respect of copper ore delivered to the Mona smelting works, 1830-1831 (both are addressed on the dorse to Thomas Jones, mine agent, New Mine, Llandidno, and the first is accompanied by a covering letter from Evan Evans, Mona Lodge Office, January 1831); an account relating to the Trecastell [co. Caernarvon] mine, 1811-1812; and extracts from a letter from John Wynn of Gwedir [sic] [later Sir John Wynn, 1st. bart.] to [Ralph Eure, 3rd] lord Eure, [lord] president [of the Council] of Wales, 30 November 1607, and from an undated letter from the said John Wynn to Sir Thomas Middleton [Kt., of Chirk Castle], both relating to Anglesey mineral water and experiments in connection with the production of copper.