+Source.+--_Matthew of Westminster_, vol. ii., pp. 471-472. (Bohn's
Libraries.)
In the fortnight after Easter the King withdrew from Westminster, and
hastened towards Wales with all the military force of the kingdom of
England, taking with him, as far as Shrewsbury, his Barons of the
Exchequer and his justices of the King's Bench, who remained there some
time, hearing suits according to the customs of the kingdom of England.
The Welsh, fearing the arrival of the King and his army, fled to their
accustomed refuge of Snowdon, and the King, relying on the assistance of
the Cinque Ports, occupied their territories as far as the mountain of
Snowdon in every direction. Therefore Llewellyn, Prince of Wales,
understanding that his manors and castles were being given to the flames
and destroyed, took to himself the most powerful chiefs of his country,
and about the Feast of the Nativity of the Lord in the aforesaid year,
went to the King, entreating him to show mercy and not justice.
Accordingly, King Edward received homage and fealty from the most
powerful chiefs of the Welsh, and took with him to Westminster their
Prince Llewellyn, from whom he received fifty thousand marks in hand;
and with whom he made a covenant to receive a thousand marks every year,
to be paid into the Exchequer at Westminster for the Isle of Anglesey
and the district of Snowdon; and then he permitted the aforesaid Prince
to return to those parts, after having been carefully instructed in his
duty. Further, by a formal sentence, he deprived Llewellyn's successors
for ever of the title of Prince, and reserved all the rest of the
territories of Wales of which he had lately made himself master for
himself and his successors, the Kings of England.