Papers of, and acquired by, the Welsh Church Commission, 1283-1960, including records of the Commission, 1914-1960; records relating to border parishes, 1914-1915; accounts, 1920-1958; papers relating to Sir Alfred Watson, 1916-1941; records concerning compensation to lay holders of freehold offices, 1915-1931; records relating to burial grounds, 1934-1947; records relating to the destination of records, 1914-1960; records relating to parish lands, 1844-1946; manorial records and court books, 1842-1925; transfer of documents, 1822-1947; deeds of properties, 1566-1929; and rentals and surveys, 1919-1947.

Professional papers of Ywain Goronwy ap Griffith comprising agreements, specifications, plans and correspondence, 1927-53, mainly relating to the alteration, repair and erection of new buildings, both private and public, in Merionethshire, Montgomeryshire and Caernarfonshire; files relating to work done in the diocese of Bangor, mainly in the form of alterations and repairs to vicarages, 1932-1952; and papers, 1920-40, relating to the redemption of tithe rent-charges in various parishes of Anglesey, Caernarfonshire, Cardiganshire and Merionethshire.