[1] Thirdlie, that the land of the foure cantreds with|out all contradiction should remaine for euer to the king and his heires, with all lands conquered by the king and his people, the Ile of Anglesey excepted, which Ile was granted to the prince, so that he should paie for the same yearelie the summe of one thou|sand marks, and fiue thousand marks for an income. Prouided, that if the prince chanced to die without is|sue, then the said Ile to reuert againe into the kings hands.