Shortly after Thomas' election, Lanfranc, pursuing a claim that Canterbury was the primatial see, or bishopric, of England, demanded that Thomas provide a written oath swearing to obey both Lanfranc and any future Archbishops of Canterbury. Thomas declined to make such a written promise, so Lanfranc refused to consecrate him. Thomas argued that Lanfranc's demand was unprecedented, as no other Archbishop of York had been required to swear such an oath before. King William wanted clear lines of authority in the church to match the lines of authority in the secular sphere; thus, the King supported Lanfranc in the dispute. Royal pressure induced Thomas to submit to Lanfranc and Thomas was consecrated, but his profession of obedience was made orally to Lanfranc personally and not in writing or to any future archbishops of Canterbury. Although this settled the issue between Thomas and Lanfranc, it was the beginning of the long-running Canterbury–York dispute over the claims of Canterbury to have jurisdiction over York.