Deeds, correspondence, pleadings and papers in legal actions, 18 cent.-20 cent., relating to estates in Anglesey, Caernarfonshire and Merionethshire. Miscellaneous papers include Caernarfon borough court rolls, 1392-1393, 1695-1697, and a rental, 1691-1692; papers relating to Benefit Building Societies in Caernarfonshire, 1861-1890; and a minute book of Porthaethwy ferry, 1782-8.

Copies of three documents, 1609, 1650 and 1772, relating to ferries between Anglesey and Caernarvonshire, together with a copy of the will, 1843, of Owen Jones, Tynycoed, Llandegai, who bequeathed a sum of money towards the support and maintenance of a Day School under the management and control of the Caernarvonshire monthly meeting of elders and ministers.