[Footnote 220: In 8 Henry IV, (that is, between September 30, 1406, and September 29, 1407,) a licence is recorded (Pat. 8 Hen. IV. p. i. m. 17.), by which the King permits "his dearest son Henry, Prince of Wales, to grant the advowson of the church of Frodyngham, Lincolnshire,--which was his own possession--to the abbot and convent of Renesly for ever." Long subsequently to this, we find no immediate traces of any coolness between Henry and his father.] [Footnote 221: The Prince was present, 23rd January 1407, when his father received from the Bishop of Durham the great seal of England, and delivered it to Thomas, Archbishop of Canterbury, then made Chancellor. (Claus 8 Hen. IV. m. 23, d.)] The Prince had laid siege to the castle of Aberystwith, situate near the town of Llanpadern; but how long he had been before that fortress, or, indeed, at what time he had returned to the Principality, history does not record. If, as we may infer, the King did retire, according to the suggestion of the council, "to some convenient place," the Prince's presence was more required in London; whilst, Owyn's power being evidently at that time on the decline, the necessity of his personal exertions in Wales became less urgent. No accounts of the proceedings either of Owyn, of the King, or of the Prince, at this precise period seem to have reached our time. Probably nothing beyond the siege of a castle, or an indecisive skirmish, took place during the spring and summer. Among the documents, to which allusion has just been made, one bears date September 12, 1407, containing an agreement between Henry Prince of Wales on the one part, and, on the other, Rees ap Gryffith and his associates. The Welshmen stipulate not to destroy the houses, nor molest the shipping, should any arrive; and the Prince covenants to give them free egress for their persons and goods. The motives by which he professes to be influenced are very curious: (p. 229) "For the reverence of God and All Saints, and especially also of his own patron, John of Bridlington;[222] for the saving of human blood; and at the petition of Richard ap Gryffyth, Abbot of Stratflorida."