Canterbury and never again receive Anselm as archbishop; if he were to stay, William would impose his fine and force him to swear never again to appeal to the papacy. First exile Anselm chose to depart in October 1097. Although Anselm retained his nominal title, William immediately seized the revenues of his bishopric and retained them til death. From Lyon, Anselm wrote to Urban, requesting that he be permitted to resign his office. Urban refused but commissioned him to prepare a defence of the Western doctrine of the procession of the Holy Spirit against representatives from the Greek Church. Anselm arrived in Rome by April and, according to his biographer Eadmer, lived beside the pope during the Siege of Capua in May. Count Roger's Saracen troops supposedly offered him food and other gifts but the count actively resisted the clerics' attempts to convert them to Catholicism. At the Council of Bari in October, Anselm delivered his defence of the Filioque and the use of unleavened bread in the Eucharist before 185 bishops. Although this is sometimes portrayed as a failed ecumenical dialogue, it is more likely that the "Greeks" present were the local bishops of Southern Italy, some of whom had been ruled by Constantinople as recently as 1071. The formal acts of the council have been lost and Eadmer's account of Anselm's speech principally consists of descriptions of the bishops' vestments, but Anselm later collected his arguments on the topic as . Under pressure from their Norman lords, the Italian Greeks seem to have accepted papal supremacy and Anselm's theology. The council also condemned William II. Eadmer credited Anselm with restraining the pope from excommunicating him, although others attribute Urban's politic nature. Anselm was present in a seat of honour at the Easter Council at St Peter's in Rome the next year. There, amid an outcry to address Anselm's situation, Urban renewed bans on lay investiture and on clerics doing homage. Anselm departed the next day, first for Schiavi—where he completed his work Cur Deus Homo—and then for Lyon. Conflicts with Henry I William Rufus was killed hunting in the New Forest on 2 August 1100. His brother Henry was present and moved quickly to secure the throne before the return of his elder brother Robert, Duke of Normandy, from the First Crusade. Henry invited Anselm to return, pledging in his letter to submit himself to the archbishop's counsel.