Throughout the time of Henry's Norman war, he was engaged in a tiresome controversy with the primate on the question of lay investitures, the continuation of the struggle which had begun in his brother's reign. Every English king for five generations had to face the danger from the church, no less than the danger from the barons. Anselm had come back from Rome confirmed in the theories for which he had contended with Rufus--nay, taught to extend them to a further extreme. He now maintained not only that it was a sin that kings should invest prelates with their spiritual insignia, the pallium, the staff, the ring, but claimed that no clerk ought to do homage to the king for the lands of his benefice, though he himself seven years before had not scrupled to make his oath to his earlier master. He now refused to swear allegiance to the new monarch, though he had recalled him and had restored him to the possession of his see. He also refused to consecrate Henry's nominees to certain bishoprics and abbacies on the ground that they had not been chosen by free election by their chapters or their monks. The king was loath to take up the quarrel, for he highly respected the archbishop; yet he was still more loath to surrender the ancient claims and privileges of the crown. Anselm was equally reluctant to force matters to an open breach, yet would not shift from his position. There followed an interminable series of arguments, interrupted by truces, till at last Anselm, at the king's suggestion, went to Rome to see if the pope could arrange some _modus vivendi_. Paschal II. for some time refused to withdraw from his fixed theory of the relation of church and state, and Anselm, in despair, preferred to remain abroad rather than to press matters to the rupture that seemed the only logical issue of the controversy. But in 1107 the pope consented to a compromise, which satisfied the king, and yet was acceptable to the church. Bishops and abbots were for the future to be canonically elected by the clergy, and were no longer to receive the ring and staff from lay hands. But they were to do homage to the king for their lands, and since they thus acknowledged him as their temporal lord Henry was content. Moreover, he retained in practice, if not in theory, his power to nominate to the vacant offices; chapters and monasteries seldom dared to resist the pressure which the sovereign could bring to bear upon them in favour of the candidate whom he had selected. The arrangement was satisfactory, and served as the model for the similar compromise arrived at between Pope Calixtus II. and the emperor Henry V. fifteen years later. From 1107 onward Henry was freed from both the dangers which had threatened him in his earlier years, and was free to develop his policy as he pleased. He had yet twenty-eight years to reign, for he survived to the age of sixty-seven, an age unparalleled by any of his predecessors, and by all his successors till Edward I.