Meanwhile, during the three years of Richard's absence England had been much disturbed. William Longchamp, the haughty and tactless bishop whom he had left behind him as Justiciar, made himself so much disliked by his pride, his despotism, and his violence that there was a general rising against him. The king's brother John, the Earl of Cornwall, put himself at the head of the malcontents, and began seizing all the royal castles on which he could lay hands. Longchamp was at last forced to resign his place and fled over-sea, hardly escaping the fury of the people at Dover, where he was caught in the disguise of a huckster-woman and nearly pulled to pieces. His place as Justiciar was taken by Archbishop Walter of Rouen, whom Richard sent home from the Crusade for the purpose. Walter was a prudent and able man, but found a hard task before him, for Earl John was set on making himself a party in England, and aimed at the crown. When the news of Richard's captivity reached London, John openly avowed his intention, and allied himself with Philip of France. That prince had begun to intrigue against the King of England the moment that he got back from the Crusade. He had a claim on the Vexin, a district on the Norman border, which he had once ceded to Henry II. on the understanding that it should be the dowry of a French princess whom Richard was to marry. As the marriage had never taken place, and the English king had chosen another bride, Philip had much show of reason on his side. But he aimed not only at recovering the Vexin, but at winning as much of his absent neighbour's land as he could seize. With this object he offered to support Earl John in his attempt to seize the English throne, in return for some territorial gains. John was ready enough to agree, did homage to him, and gave him up the Vexin and the city of Tours. Meanwhile they both sent secret messages to the Emperor Henry, to beg him to detain Richard in prison as long as possible. [Sidenote: =Richard's ransom.=]