Henry could not afford to let the dominion of Ireland, to which he had looked forward for himself, slip from his hands, nor to risk the danger that an independent state might be formed so close to England by his own vassals. Already the Earl of Pembroke was out of favour; it was said that his lands had been forfeited, and he might easily become a rebel difficult to subdue in his new possessions. At the moment he certainly had no thought of rebellion, and he at once obeyed the summons to England. Henry had crossed from Normandy early in September, 1171, had paid a brief visit to Winchester, where Henry of Blois, once so powerful in Church and State, was now dying, and then advanced with his army through southern Wales into Pembrokeshire whence he crossed to Ireland in the middle of October. As he passed from Waterford to Cashel, and then again from Waterford to Dublin, chiefs came in from all sides, many of whom had never submitted to the Norman invaders, and acknowledged his overlordship. Only in the remoter parts of the west and north did they remain away, except Roderick of Connaught, the most powerful of the Irish kings, who was not yet ready to own himself a vassal, but claimed the whole of Ireland for himself. The Christmas feast Henry kept in Dublin, and there entertained his new subjects who were astonished at the splendour of his court. A few weeks later a council of the Irish Church was held at Cashel, and attended by all the prelates of the island except the Archbishop of Armagh whose age prevented his coming. The bishops swore allegiance to Henry, and each of them is said to have made a formal declaration, written and sealed, recognizing the right of Henry and his heirs to the kingdom of Ireland. The canons adopted by the council, putting into force rules of marriage and morals long established in practice in the greater part of Christendom, reveal the reasons that probably led the Church to favour the English conquest and even to consider it an especially pious act of the king. A report of Henry's acceptance by the Irish kings and of the acts of the council was sent at once to the pope, who replied in three letters under date of September 20, 1172, addressed to Henry, to the Irish bishops, and to the Irish kings, approving fully of all that had been done.