Æson would have lived content there were it not that he was fearful for Jason, his infant son. Jason, he knew, would grow into a strong and a bold youth, and Pelias, the king, would be made uneasy on his account. Pelias would slay the son, and perhaps would slay the father for the son's sake when his memory would come to be less loved by the people. Æson thought of such things in his hidden house, and he pondered on ways to have his son reared away from Iolcus and the dread and the power of King Pelias.
He had for a friend one who was the wisest of all creatures Chiron the centaur; Chiron who was half man and half horse; Chiron who had lived and was yet to live measureless years. Chiron had fostered Heracles, and it might be that he would not refuse to foster Jason, Æson's child.
Away in the fastnesses of Mount Pelion Chiron dwelt; once Æson had been with him and had seen the centaur hunt with his great bow and his great spears. And Æson knew a way that one might come to him; Chiron himself had told him of the way.
Now there was a slave in his house who had been a huntsman and who knew all the ways of the Mountain Pelion. Æson talked with this slave one day, and after he had talked with him he sat for a long time over the cradle of his sleeping infant. And then he spoke to Alcimide, his wife, telling her of a parting that made her weep. That evening the slave came in and Æson took the child from the arms of the mournful-eyed mother and put him in the slave's arms. Also he gave him a horn and a ring with a great ruby in it and mystic images engraved on its gold. Then when the ways were dark the slave mounted a horse, and, with the child in his arms, rode through the city that King Pelias ruled over. In the morning he came to that mountain that is all covered with forest, the Mountain Pelion. And that evening he came back to the village and to Æson's hidden house, and he told his master how he had prospered.
Æson was content thereafter although he was lonely and although his wife was lonely in their childlessness. But the time came when they rejoiced that their child had been sent into an unreachable place. For messengers from King Pelias came inquiring about the boy. They told the king's messengers that the child had strayed off from his nurse, and that whether he had been slain by a wild beast or had been drowned in the swift River Anaurus they did not know.