Licences granted by William Ormsby Gore, Mary Jane his wife and John Ralph Ormsby Gore for the mining of slate and stone, sulphur, copper, lead, tin, iron, gold, silver, manganese, calamine and other minerals, mainly in Caernarfonshire, 1849-1872. The locations include Oer Dwr Ucha in the parish of Beddgelert, Plas yn Pennant, Braich y Ddinas and Bwlch y Fedwen in Penmorfa, Tyddyn Madyn and Ymwlch Bach in Llanystumdwy and Llanfihangel-y-Pennant, Hendre Ddu, Sgyborgerrig and Tyddyn Mawr in the parish of Dolbenmaen, Mynyddednyfed and Braich y Sant in the parish of Cricieth, all in Caernarfonshire, and Bwlch y Plwm and Pant y Maesydd in Lanfrothen, Merioneth. The lessees include John Hall Holdsworth and W. Attenborough of London, 1849, Henry Hodgson, 1851, Samuel Holland of Plas yn Penrhyn, 1852, 1855, William Williams of Beddgelert and Robert Williams of Llanllyfni, 1852, Hugh Evans of Cricieth, 1856, Morris Roberts of Mynyddednyfed, Cricieth, 1856, Hugh Jones of Alltyfedw and John Morris of Garn Dolbenmaen, 1860, 1862, John Brewer of Bryn Helen, 1861, Robert Jones, Thomas Williams, Henry Owen and John Jackson, 1861, Thomas Swift of Salford, Manchester, 1864, Owen Humphrey Davies of Llanfihangel-y-Pennant 1864, 1866, Joseph Kellow and Joseph Day (assigneee), 1872. The file also contains letters of Robert Barker, 1851, and Longueville and Co., 1871; and a statement of royalties payable under Mrs Ormsby Gore’s mining leases, 1866.