It is in this book that we find the story of how Gregory saw the pretty children in the Roman slave market, and of how, for love of their fair faces, he sent Augustine to teach the heathen Saxons about Christ. There are, too, many stories in it of how the Saxons became Christian. One of the most interesting, perhaps, is about Edwin, King of Northumbria. Edwin had married a Christian princess, Ethelberga, sister of Eadbald, King of Kent. Eadbald was, at first, unwilling that his sister should marry a pagan king. But Edwin promised that he would not try to turn her from her religion, and that she and all who came with her should be allowed to worship what god they chose. So the Princess Ethelberga came to be Queen of Northumbria, and with her she brought Paulinus, "a man beloved of God," as priest. He came to help her to keep faithful among a heathen people, and in the hope, too, that he might be able to turn the pagan king and his folk to the true faith. And in this hope he was not disappointed. By degrees King Edwin began to think much about the Christian faith. He gave up worshipping idols, and although he did not at once become Christian, "he often sat alone with silent lips, while in his inmost heart he argued much with himself, considering what was best to do and what religion he should hold to." At last the King decided to call a council of his wise men, and to ask each one what he thought of this new teaching. And when they were all gathered Coifi, the chief priest, spoke. "'O King,' he said, 'consider what this is which is now preached to us; for I verily declare to you, that the religion which we have hitherto professed has, as far as I can learn, no virtue in it. For none of your people has applied himself more diligently to the worship of our gods than I. And yet there are many who receive greater favors from you, and are more preferred than I, and are more prosperous in their undertakings. Now if the gods were good for anything, they would rather forward me, who have been more careful to serve them. It remains, therefore, that if upon examination you find those new doctrines, which are now preached to us, better and more efficacious, we immediately receive them without delay.'