• Clwyd Record Office – List of material relating to lead mining.
  • Memorandum of Association and papers relating to the Brynfelin Mining Company Ltd – 1861.
  • Llanfair Mines (Abergele) – eight pages of notes dated August 1978.
  • Copy of report by John Lean – June 1890. Schedule of buildings and plant – 1900.
  • List of share-holders – 1901.
  • Minera Ragman Mine – Report by William Hill – 1866.
  • Minera Union Mining Company Ltd – Directors’ Report – Sept. 1872.
  • Correspondence and notices relating to calls on shares – 1872.
  • Articles of Association and papers relating to the winding up of the Talargoch Mining Company Ltd – c1875.
  • Notes on copper mines in North Wales from Smith and Dewey’s “Copper Ores of the Midlands, Wales, The Lake District and the Isle of Man”.
  • Moissenet, L.V. “Memoire sur le gisement de Mineral de Plomb dans la calcaire carboniferous du Flintshire” Annales Des Mines, Ser.5 tome XI (1857), pp.351-446.