The archbishop remained abroad several years, during which negotiations were carried on. In 1106 a compromise was agreed to, by the terms of which the more important parts of the investiture--the oaths of fealty and homage--were retained by the king; while the Pope was content with the merely symbolic presentation of the ring and crozier. Upon these lines the question, which had long agitated Europe, was afterwards settled at Worms between Calixtus II. and the Emperor Henry V. After the return of Anselm, a number of canons were passed by a council of the Church, enforcing upon the clergy the obligation of celibacy. Lanfranc had previously exerted himself to promote this object, though with only partial success; and Anselm now undertook to enforce the same measures. Those priests who were married were commanded to separate from their wives, whom they were never again to see, except in the presence of witnesses. Any who should refuse compliance were to be excommunicated and deposed from the order. In the year 1109 Anselm died at the age of seventy-six. He was a man of very great ability and erudition, the evidences of which may be found in his writings, which are still extant. He exerted himself to establish schools, and to promote the spread of knowledge throughout the country, and the news of his death was received with general regret among the people. He represented in saintliness, administrative powers, and political foresight the highest ideals of mediæval Christendom. The treaty which had been signed between Henry and Robert in no degree affected the policy of the king, who showed himself as unscrupulous and careless of his plighted faith as had been his brother Rufus. Determined to punish those barons who had supported the Duke of Normandy, and whose power and position rendered their disaffection a matter to be dreaded, Henry took measures calculated to excite them to some overt act of rebellion, which should enable him to proceed against them without the shame of a direct violation of the treaty. The first who became the object of attack was Robert de Belesme, Earl of Shrewsbury, who held large possessions in Normandy as well as in England. De Belesme was summoned before the general assembly held in the king's palace, to answer forty-five charges which were brought against him. On appearing before the council, the earl, according to the custom of the time, demanded leave to go and consult with his friends respecting his accusation and the conduct of his defence. The permission having been granted, the earl immediately quitted the court, took horse, and galloped off to one of his fortified castles.