Records mainly of the lead, silver and copper mines belonging to the Gogerddan estate in North Cardiganshire, at Allt y Crib, Blaenceulan, Bronfloyd, Bryn yr Afr, the Bog, Camdwr Bach, Camdwr Mawr, Cwmsymlog, Darren, Eaglebrook, Esgair Hir, Esgair Fraith, Hafan and Henfwlch, the Island, Loveden Mine, South Darren, Taliesin and the Vaughan Mines, mainly in the parishes of Llanbadarn Fawr, Llanfihangel Genau’r-glyn and Llangynfelyn, Grogwynion in the parish of Llanafan and numerous other locations. These papers often incorporate records of the stone quarries at Hafan, Cwmere, Pentalwr, Penrhyngerwyn, Penglais and other sites. The various series comprise ore weighing tickets, 1850-1862; tack (take) notes, 1732-1924; bargain books, 1825-1851; miscellaneous Gogerddan mining accounts, 1668-1918; mining ledgers, 1875-1918; mining receipt books, 1897-1918; Gogerddan and East Darren mining cost books and ledgers: 1842-1894; royalty returns, 1774, 1838-1910; leases and agreements, 1656-1918; mining surveys, reports, prospectuses, etc., 1670-1923; letters, 1697-1920; and sale catalogues, 1882-1915.