The King now adopted prompt and vigorous measures for the suppression of the rebellion in Wales; and with that view issued from Worcester an ordinance to several persons by name, to keep their castles in good repair, well provided also with men and arms. Among others, the Bishop of St. David's is strictly charged as to his castle of Laghadyn; Nevill de Furnivale, for Goodrich; Edward Charleton of Powis, for Caerleon and Usk; John Chandos, for Snowdon. On the 10th of September, the King, still at Worcester, created his son, John of Lancaster, Constable of England. On the 14th he was at Hereford,[179] when he gave a warrant to William Beauchamp, (to whom was intrusted the care of Abergavenny and Ewias Harold,) to receive into their allegiance the Welsh rebels of those lordships. A similar warrant for the rebels of Brecknock, Builth, Haye, with others, is given, on the 15th, to Sir John Oldcastle, John ap Herry, and John Fairford, clerk, dated Devennock. The King was then on his route towards Caermarthen,[180] where he stayed only a short time; and left the Earl of Somerset, (p. 184) Sir Thomas Beaufort, the Bishop of Bath, and Lord Grey to keep the castle and town for one month. He shortly afterwards commissioned Prince Henry to negociate with those persons for their pardon who had been excepted from the act of oblivion after the battle of Shrewsbury.[181] [Footnote 179: On the 12th, he had issued a proclamation from Hereford for his lieges to meet him there forthwith.] [Footnote 180: Caermarthen suffered very seriously in this war: the Pell Rolls, June 26, 1406, record the payment of a sum to the Burgesses and Goodmen of Caermarthen, in mitigation of the losses they had sustained. On this occasion the King arrived there on the 25th and stayed till the 29th.] [Footnote 181: On the 2nd of October, the King issued a proclamation against Owyn. He seems to have returned through Gloucester to London, immediately after the 17th October; on which day a warrant to Robert Waterton, to arrest Elizabeth wife of the late Henry Percy, is dated Gloucester. On the 8th of October, those four persons whom Henry had left in charge of Caermarthen, implore the council by letter to send the Duke of York, or some other general, to take charge of the King's interests in that district, and to furnish troops to succeed those whom the King had left in trust there, since they had expressed their determined resolution not to remain beyond their month.]