Gregory organized the new Church, in the full belief that it would extend over the whole island. He sent Augustin the "pall," a vestment denoting metropolitan authority, and constituting the recipient vicar of the Pope. Two metropolitan sees were to be established--the one at London, the residence of the East Saxon King Saeberct, who reigned as sub-king under AEthelberht, a crowded mart, and the centre of a system of roads; the other at York, the capital of the old Roman province north of the Humber. Both archbishops were to receive the pall, and to be of equal authority. At the same time, the unity of the Church was ensured, for they were to consult together and act in unison. Both the provinces were to be divided into twelve suffragan bishoprics, and as the northern province took in the country now called Scotland, they were of fairly equal size. This arrangement was not to be carried out until after Augustin's death. As long as he lived all the bishops alike were to obey him, and he was, we may suppose, to continue to reside at Canterbury. Moreover, the clergy of the Welsh or Britons were to be subject to him and to the future archbishops of the English Church. Augustin endeavoured to persuade the Welsh clergy to join him in preaching the Gospel to the Teutonic invaders, and held a meeting with them at or near Aust, on the Severn. But they refused to acknowledge his authority, or even to hold communion with him, and would not give up their peculiar usages with respect to the date of Easter and the administration of Baptism. At Augustin's request, Gregory sent him a letter of instructions as to the government of the Church. It bears witness to the Pope's largeness of mind. While morality and decency were to be enforced, the archbishop was not bound strictly to follow the Roman ritual; if he found anything that he thought would be helpful to his converts in the Gallican or any other use, he might adopt it, and so make up a use collected from various sources. [Sidenote: Causes of its failure.]