It was, indeed, impossible, from the very nature of things, that Celtic Christianity should long prevail in England, for its arrangements were based on the loose organization of the sept, and the English needed arrangements that suited kingship and tended towards political as well as ecclesiastical union. Its rejection was, however, determined by questions of Church order. Up to the middle of the fifth century the Celtic Christians computed Easter by the Roman lunar cycle, which had gradually diverged from that of Eastern Christendom. When, however, the Romans adopted a new system of computation, the Welsh and the Irish Scots adhered to the old cycle; and they further differed from the Roman Church as regards the shape of the tonsure and the rites observed in the administration of Baptism. Unimportant as such differences may seem to us, they were really no light matters; for, as the Church was engaged in a conflict with paganism, unity with itself was of the first consequence. The points at issue began to be much debated in Northumbria when the gentle-spirited Aidan was succeeded at Lindisfarne by Finan, a man of violent temper. The Bernician court was divided. Oswiu was attached to the Scottish communion, and his attachment was strengthened by his regard for Colman, the successor of Finan. On the other hand, his queen, Eanflaed, the daughter of Eadwine, belonged to the Roman party; and so it came about that, while the king was keeping his Easter feast, his queen was still in the Lenten fast. Oswiu's son, Alchfrith, who reigned as under-king in Deira, left the Scottish communion and eagerly upheld the Roman party. He was encouraged by Wilfrith, the abbot of Ripon. Wilfrith, who was the child of wealthy parents, had been led by the unkindness of his stepmother to desire to become a monk, and had been sent, when a handsome, clever lad of thirteen, to Queen Eanflaed, that she might decide what he should do. Eanflaed sent him to Lindisfarne, and he stayed there for some years. Then she helped him to visit Rome, and he made the journey, which was as yet unknown to his fellow-countrymen, partly in the company of Benedict Biscop, who became the founder of Roman monasticism in the north of England. While he was at Rome Wilfrith studied ecclesiastical matters, and especially the subject of the computation of Easter. He returned home fully convinced of the excellence of the Roman Church, and found in Alchfrith a warm friend and willing disciple. Alchfrith had built a monastery at Ripon, and peopled it with Scottish monks from Melrose. When he adopted the Roman customs, these monks, of whom Cuthberht was one, refused to follow his example, and accordingly he turned them out, and gave the monastery to Wilfrith. [Sidenote: The synod of Whitby, 664.]