When the crew returned to Iolcus, they had only been absent four months; and Jason gave the fleece to his uncle Pelias, and dedicated the Argo to Neptune.  He found his father Æson grown very old, but Medea undertook to restore him to youth.  She went forth by moonlight, gathered a number of herbs, and then, putting them in a caldron, she cut old Æson into pieces, threw them in, and boiled them all night.  In the morning Æson appeared as a lively black-haired young man, no older than his son.  Pelias’ daughters came and begged her to teach them the same spell.  She feigned to do so, but she did not tell them the true herbs, and thus the poor maidens only slew their father, and did not bring him to life again.  The son of Pelias drove the treacherous Medea and her husband from Iolcus, and they went to Corinth, where they lived ten years, until Jason grew weary of Medea, and put her away, in order to marry Creusa, the king’s daughter.  In her rage, Medea sent the bride the fatal gift of a poisoned robe, then she killed her own children, and flew away, in a chariot drawn by winged serpents, to the east, where she became the mother of a son named Medus, from whom the nation of Medes was descended.  As to Jason, he had fallen asleep at noon one hot day under the shade of the Argo, where it was drawn up on the sand by Neptune’s temple, when a bit of wood broke off from the prow, fell on his head, and killed him.