John York's houses : Tŷ'n y Tŵr and Cochwillan : historic Bethesda buildings associated with John Williams , Archbishop of York /
Morgan, Keith,of Bethesda.
Caffell, Gwenno.
Pennant, John Douglas.
Bangor : Cymdeithas Archaeoleg Llandegai a Llanllechid,
2001.
Cover title.
Bibliography: p. 48-50.
Williams, John, 1582-1650.
Tŷ'n y Tŵr (Bethesda, Wales).
Cochwillan Hall (Bethesda, Wales).
Historic buildings