Ffynh 7J

In the same year, around the feast of St Michael, the Welsh rose in rebellion. For they had met together and decided among themselves that on the same day of St Michael they would all rise together against the king and attack his castles, and thus they did and on the same day, as if by surprise, they took many castles and they took the castle of Caernarfon, which our king had not long since constructed at great expense, demolishing the walls and slaughtering the king’s ministers, and those Englishmen who could, fled and many were overwhelmed with the edge of the sword ... Moreover, the instigators of this treason were two named Madog and Morgan, who said that they were descended from the stock of Prince Llywelyn and that they should therefore assume the name of prince.

(1294 in H. Rothwell (ed.) The Chronicle of Walter of Guisborough, Royal Historical Society, Camden Third Series, vol. LXXXIX, London, 1957, p. 251 [Tip: daliwch Ctrl a chliciwch dolen i'w agor mewn tab newydd. (Cuddio tip)] )