sentences:  It was in a bog in the northern foothills of Bera Mawr, at a place called Nanhysglain, that Prince Dafydd ap Gruffudd and his family were betrayed and captured in June 1283 during the Conquest of Wales by Edward I.In October, Dafydd was executed at Shrewsbury on the orders of Edward I.His death marked the end of the 700-year rule of Gwynedd by the family descended from Cunedda Wledig and an independent Wales.