Anselm stood loyally by Henry over the question of his marriage with Edith (who claimed release from vows taken under compulsion in a convent at Romsey), and his fidelity at the critical time when Robert of Normandy and the discontented nobles threatened the safety of the Crown was invaluable. But Henry was an absolutist, anxious for all the threads of power to be in his own hands; and just when a great Church Council at the Lateran had decided that bishops must not be invested by kings with the ring and staff of their office, because by such investiture they were the king's vassals, Henry decided to invite Anselm to receive the archbishopric afresh from the King's hands by a new act of investiture. To Anselm the abject submission of the bishops to the Red King had been a painful spectacle; and now Henry was making a demand that would emphasise the royal supremacy, and the demand was intolerable and impossible. Again Anselm stood practically alone in his resistance to the royal will, and again the question in dispute was whether there was any power in England higher than the Crown. The papal supremacy was no more under discussion than it had been under William. All that Henry wanted was that the archbishops and bishops should acknowledge that their authority came from the Crown; and at Henry's request Anselm, then 70 years old, again journeyed to Rome to lay the matter before the Pope. Pope Paschal was fully alive to the mischief of making the bishops and clergy mere officers of kings, and it was soon seen there could be no dispensations from Rome even for Henry. All that the Pope would allow was that bishops might do homage to the Crown for their temporal rights, and with this Henry had to be content. It was three years later before Anselm returned, and his course was now nearly run. He died at peace on April 21st, 1109, having wrought to no small purpose for religious liberty and the independence of the clergy. (The demand for political and social independence always follows the struggle for independence in religion.) Anselm spent the greater part of his life after his enthronement at Canterbury in battling for independence of the Crown; a century later Archbishop Stephen was to carry the battle still further, and win wider liberties for England from the Crown. Of Anselm's general love of liberty and hatred of all tyranny many stories are told. One fact may be recalled. The Church Synod, which met at Westminster in 1102, at Anselm's request, attacked the slave trade as a "wicked trade used hitherto in England, by which men are sold like brute animals," and framed a Church rule against its continuance. In spite of this decree, serfdom lingered in England for centuries, but hiring superseded open buying and selling of men. (The African slave trade was the work of the Elizabethan seamen, and was excused, as slavery in the United States was excused, by the Protestant Churches on the ground of the racial inferiority of the negro.)