Account books, loose accounts and receipts deriving from administration of the estates of Clenennau, Glyn, Sylfaen and Ystumcegid, 1534-1827. They typically show the income from rents and usual outgoings for tithes, taxes, other dues and charity payments; occasional rentals; profits from estate produce; disbursements for repair and maintenance of the farm houses, outbuildings and mills, especially Singrig Mill; purchase and carriage of commodities; keeping livestock; employees' wages; and agent's travelling expenses and subsistence. The accounts for some years, notably the loose accounts of 1705-1711 and the account book of 1725-1750, exhibit a systematic arrangement by type and still bear the original numbers.