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- E Hubbard, The Work of John Douglas, 1991, p139;,
- A N Palmer, The Town of Holt In the County of Denbigh: Its Castle, Church, Franchise, Demesne, Fields etc together with the Parish of Isycoed, 1910, p306-8;,
- D R Thomas, History of the Diocese of St Asaph, Vol I p151 and Vol III p259;,
- Lloyd Williams & Underwood, The Village Churches, etc, of Denbighshire, 1872.,