Civil War. Death of John. Langton departed at once to Rome, to endeavour to turn the heart of his former patron, a task in which he utterly failed. Many of the clergy who had hitherto supported the baronial cause drew back in dismay at the pope's attitude. But the laymen were resolute, and prepared for open war, which broke out in October 1215. The king, who had already gathered in many mercenaries, gained the first advantage by capturing Rochester Castle before the army of the barons was assembled. So formidable did he appear to them for the moment that they took the deplorable step of inviting the foreign foe to join in the struggle. Declaring John deposed because he had broken his oath to observe the charter, they offered the crown to Louis of France, the son of King Philip, because he had married John's niece Blanche of Castile and could assert in her right a claim to the throne. This was a most unhappy inspiration, and drove into neutrality or even into the king's camp many who had previously inclined to the party of reform. But John did his best to disgust his followers by adopting the policy of carrying out fierce and purposeless raids of devastation all through the countryside, while refusing to face his enemies in a pitched battle. He bore himself like a captain of banditti rather than a king in his own country. Presently, when the French prince came over with a considerable army to join the insurgent barons, he retired northward, leaving London and the home counties to his rival. In all the south country only Dover and Windsor castles held out for him. His sole success was that he raised the siege of Lincoln by driving off a detachment of the baronial army which was besieging it. Soon after, while marching from Lynn towards Wisbeach, he was surprised by the tide in the fords of the Wash and lost part of his army and all his baggage and treasure. Next day he fell ill of rage and vexation of spirit, contracted a dysenteric ailment, and died a week later at Newark (Oct. 19, 1216). It was the best service that he could do his kingdom. Owing to the unwise and unpatriotic conduct of the barons in summoning over Louis of France to their aid, John had become in some sort the representative of national independence. Yet he was so frankly impossible as a ruler that, save the earls of Pembroke and Chester, all his English followers had left him, and he had no one to back him but the papal legate Gualo and a band of foreign mercenaries. When once he was dead, and his heritage fell to his nine-year-old son Henry III., whom none could make responsible for his father's doings, the whole aspect of affairs was changed. Henry III.