a letter forbidding his return and withdrew to Lyon to await Paschal's response. On 26 March 1105, Paschal again excommunicated prelates who had accepted investment from Henry and the advisors responsible, this time including Robert de Beaumont, Henry's chief advisor. He further finally threatened Henry with the same; in April, Anselm sent messages to the king directly and through his sister Adela expressing his own willingness to excommunicate Henry. This was probably a negotiation tactic but it came at a critical period in Henry's reign and it worked: a meeting was arranged and a compromise concluded at L'Aigle on 22 July 1105. Henry would forsake lay investiture if Anselm obtained Paschal's permission for clerics to do homage for their lands; Henry's bishops' and counselors' excommunications were to be lifted provided they advise him to obey the papacy (Anselm performed this act on his own authority and latter had to answer for it to Paschal); the revenues of Canterbury would be returned to the archbishop; and priests would no longer be permitted to marry. Anselm insisted on the agreement's ratification by the pope before he would consent to return to England, but wrote to Paschal in favour of the deal, arguing that Henry's forsaking of lay investiture was a greater victory than the matter of homage. On 23 March 1106, Paschal wrote Anselm accepting the terms established at L'Aigle, although both clerics saw this as a temporary compromise and intended to continue pressing for reforms, including the ending of homage to lay authorities. Even after this, Anselm refused to return to England. Henry travelled to Bec and met with him on 15 August 1106. Henry was forced to make further concessions. He restored to Canterbury all the churches that had been seized by William or during Anselm's exile, promising that nothing more would be taken from them and even providing Anselm with a security payment. Henry had initially taxed married clergy and, when their situation had been outlawed, had made up the lost revenue by controversially extending the tax over all Churchmen. He now agreed that any prelate who had paid this would be exempt from taxation for three years. These compromises on Henry's part strengthened the rights of the church against the king. Anselm returned to England before the new year. Final years In 1107, the Concordat of London formalized the agreements between the king and archbishop, Henry formally renouncing