Records of the Lloyd family of Cefn, Denbighshire, and of their estates in Caernarfonshire, Denbighshire and Flintshire, mainly comprising deeds, 1422-1900, including deeds relating to lead and coal mines in Flintshire and copper mines in Caernarfonshire, 18-19 cent.; papers relating to ecclesiastical affairs, 1562-1864; and important papers of Humphrey Humphreys (1648-1712), cleric and antiquarian, and bishop of Bangor, 1689-1701, and Hereford, 1701-12, relating to his period as bishop of Hereford.