A ledger, 1880-1907, of Richard Jones, builder, contractor, and wheelwright, of Twrog Mill, Llanwnda, Caernarvonshire. Some of the accounts relate to the 'Book Depository', Caernarvon, to the Fletcher Slate Yard, Caernarvon, to Penyrorsedd Slate Company, and to schools and Nonconformist meeting-houses in the county.

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.