Incensed with Becket for his repudiation of his original submission, Henry proceeded to open a campaign of lawsuits against him, in order to force him to plead in secular courts. He also took the very mean step of declaring that he should call him to account for all the moneys that had passed through his hands when he was chancellor, though Becket had been given a quittance for them when he resigned the office more than two years before. The business came up at the council of Northampton (October 1164), when the archbishop was tried for refusing to recognize the jurisdiction of the king's courts, and declared to have forfeited his movable goods. The sentence was passed by the lay members of the Curia Regis alone, the bishops having been forbidden to sit, and threatened with excommunication if they did so, by the accused primate. When Becket was visited by the justiciar who came to rehearse the judgment, he started to his feet, refused to listen to a word, declared his repudiation of all lay courts and left the hall. That same night he made a second attempt to escape from England and this time succeeded in getting off to Flanders. From thence he fled to the court of the pope, where he received less support than he had expected. Alexander III. privately approved of all that he had done, and regarded him as the champion of the Church, but he did not wish to quarrel with King Henry. He had lately been driven from Rome by the emperor Frederick I., who had installed an antipope in his place, and had been forced to retire to France. If he sided with Becket and thundered against his persecutor, there was small doubt that the king of England would adhere to the schism. Accordingly he endeavoured to temporize and to avoid a rupture, to the archbishop's great disgust. But since he also declared the Constitutions of Clarendon uncanonical and invalid, Henry was equally offended, and opened negotiations with the emperor and the antipope. This conduct forced Alexander's hand, and he gave Becket leave to excommunicate his enemies. The exile, who had taken refuge in a French abbey, placed the justiciar and six other of the king's chief councillors under the ban of the Church, and intimated that he should add Henry himself to the list unless he showed speedy signs of repentance (April 1166).