Upon this John and Philip made a fresh truce which grew into a peace, by which Arthur’s interests were finally sacrificed, and which was cemented by the marriage of Blanche of Castile, John’s niece, to Lewis, the son and heir of Philip. This was accomplished in May 1200. Philip’s matrimonial difficulties, which arose from his wanton repudiation of his second wife, Ingeburga of Denmark, exposed him at the time to a threat of interdict, and he probably thought it wise not to have both John and Innocent III. arrayed against him at once. John, seeing the marriage laws practically in abeyance, had taken advantage of the objection which had been raised by Archbishop Baldwin to his marriage, and released himself from his wife, Hawisia of Gloucester, on the ground of relationship. Now inspired either by love or territorial covetousness, he married Isabella, the child-heiress of the Count of Angoulême. This marriage offended on the one side of the Channel, Hugh of la Marche, who was betrothed to her, and on the other side the great kinsmen of the house of Gloucester, and the lady Hawisia herself, who subsequently married Geoffrey de Mandeville, one of the bitterest of John’s enemies. [Sidenote: Forfeiture of Normandy. ] [Sidenote: Death of Arthur. ] [Sidenote: Loss of Normandy and Anjou. ] The peace did not last longer than Philip’s domestic difficulties, which came to an end on his consenting to receive back Ingeburga. Mischief began in 1201, both on the Norman frontier, where Hugh de Gournay played fast and loose between the kings, and in Poictou, where the barons were excited by the Count of la Marche to rebel against the severe repression exercised by John. The next year Philip summoned courage to call John before his court of the peers of France to answer the charges of the Poictevins, and on his non-appearance declared him to have forfeited his fiefs. Arthur, who was now fifteen, and who had lost his mother the year before, thought that this was his opportunity. He mustered his forces and attempted to seize the old queen Eleanor in the castle of Mirabel. Instead of taking her he was defeated and captured by John, who imprisoned him, and in whose hands he died, how we know not, on April 3, 1203. Philip did not hesitate to declare John the boy’s murderer; he held another court upon him, and again sentenced him to forfeiture. This time he undertook the execution of the sentence himself. He invaded Normandy, and took city after city. John did not raise a hand in its defence, and quitted the duchy finally in November. The next year, 1204, saw Anjou and the rest of the patrimony in Philip’s hands; the loss of most of the Guienne followed. Eleanor died on April 1, 1204, and on her death John’s cause became hopeless. He did little or nothing to redeem it. In 1206 he tried to recover Poictou, but was obliged to purchase a truce by resigning his claims on the northern provinces; and in 1214, as a part of a general scheme