William FitzGuido, a Londoner, and Prebendary of Clondalkin,"Fasti Ecclesiae Hibernicae: The succession of the prelates Volume 2" Cotton, H. p190 Dublin, Hodges & Smith, 1848-1878 was appointed by Archbishop Archbishop Henry de Loundres to be DeanSt Patrick's Cathedral, Dublin of St Patrick's Cathedral, Dublin in 1219"Fasti Ecclesiae Hibernicae: The succession of the prelates Volume 2" Cotton, H. p92 Dublin, Hodges & Smith, 1848-1878 and served until 1238.Handbook of British Chronology By Fryde, E. B;. Greenway, D.E;Porter, S; Roy, I: Cambridge, CUP, 1996 , 9780521563505
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