Taylor 1987, p. 125; Creighton & Higham 2003, p. 49; Toy 1985, p. 161 Taylor, Arnold (1987), "The Beaumaris Castle building account of 1295–1298", in John R. Kenyon; Richard Avent (eds.), Castles in Wales and the Marches: Essays in Honour of D. J. Cathcart King, Cardiff, UK: University of Wales Press, pp. 125–142, ISBN0-7083-0948-8 Creighton, Oliver; Higham, Robert (2003), Medieval Castles, Princes Risborough, UK: Shire Archaeology, ISBN978-0-7478-0546-5 Toy, Sidney (1985) [1939], Castles: Their Construction and History, New York, US: Dover, ISBN978-0-486-24898-1