A blue-print plan of the vicarage at Pentrefelin drawn by the late Sir Clough Williams-Ellis, February 1912 (completed 1913); plans for a dual purpose church and church hall at Pentrefelin by Clough Williams-Ellis, with specifications, building contract, correspondence including letters from the architect, bills, etc., 1930s; and drawings, specifications, and a letter from Harold Hughes, Diocesan Office, Bangor [author of Old Churches of Snowdonia, etc.], relating to proposals for a new western doorway and repairs to windows at Ynyscynhaearn Church, 1934-1935.