The fabric of Welsh greatness fell at a single blow.

The chieftains who had so lately sworn fealty to Llewelyn in the southern and central parts of the country deserted him to join his English enemies in their attack; an English fleet reduced Anglesea; and the Prince was cooped up in his mountain fastnesses and forced to throw himself on Edward's mercy.

With characteristic moderation the conqueror contented himself with adding to the English dominions the coast-district as far as Conway and with providing that the title of Prince of Wales should cease at Llewelyn's death.

A heavy fine which he had incurred by his refusal to do homage was remitted; and Eleanor, a daughter of Earl Simon of Montfort whom he had sought as his wife but who had been arrested on her way to him, was wedded to the Prince at Edward's court.
[Sidenote: Judicial Reforms] For four years all was quiet across the Welsh Marches, and Edward was able again to turn his attention to the work of internal reconstruction.

It is probably to this time, certainly to the earlier years of his reign, that we may attribute his modification of our judicial system.