King Acrisius ruled Argos but possessed no heir who could take over the kingdom when he died. His only child was a lovely maiden, Danaë, but girls did not count for much then. Acrisius went to an oracle that informed him he would have no son, but that his own grandson would kill him. Greatly alarmed, the king had an underground chamber built, one with a skylight, and he imprisoned his daughter there in order that she might bear no children. However, Zeus saw the beautiful Danaë in her bronzed chamber and visited her in the form of a golden shower. Nine months later she gave birth to a son, Perseus. When Acrisius learned of this he hesitated to put them both directly to death, so instead he had his daughter and grandson sealed in a chest and cast adrift in the sea.
At length the chest landed on the beach of an island, where it was found and opened by a fisherman named Dictys. Being a kindly person, Dictys took the forlorn Danaë and her infant son home to his wife. The couple decided that they would care for Danaë and raise Perseus as if he were their own son, since they themselves were childless. Thus Perseus grew to manhood in congenial circumstances.
Danaë did not lose her beauty with the passing years, and Dictys' brother, the tyrannical king Polydectes, wished to make her his wife. But Polydectes regarded Perseus as a hindrance to his plans. Therefore he announced that he was going to marry another woman, which meant that everyone would have to present him with a gift. At the gift-giving feast Perseus was the only person present without anything to bestow upon the king. In his mortification Perseus rashly promised to bring the head of the Gorgon Medusa back as a gift. Polydectes was pleased, knowing that Perseus would die in the attempt, for one look from that hideous snake-headed monster turned men to stone. And even if Perseus should succeed, Polydectes would have a coveted trophy.
Perseus left the king's hall immediately and set sail for Greece, too upset to bid goodbye to his mother and foster parents. He went to Delphi to learn the whereabouts of the Gorgons, and while the oracle could not tell him it directed him to Dodona, the land of the whispering oaks. There Perseus learned nothing except that the gods were watching over him. Eventually though, Perseus met the god Hermes, who told him he must acquire some equipment from the Stygian nymphs. A pair of flying sandals, a magic wallet, and a helmet of invisibility would be essential for his success. Yet only the Graeae, or three gray women, knew the way to the Stygian nymphs. These crones lived far to the West beyond the river Ocean, and they had but one eye among the three of them. Hermes guided the young hero to them, and while one of the gray women was passing that single eye to another, Perseus jumped from behind and grabbed it. To get their eye back the Graeae told him where the Stygian nymphs lived. Again Hermes guided him there, and they borrowed the sandals, wallet, and helmet. In addition Hermes presented Perseus with a very sharp sickle with which to sever the Medusa's head.
Athena, too, proved helpful to Perseus, for she showed him how to distinguish between the three awful Gorgons, of whom only Medusa could be killed. The goddess also gave Perseus a mirror-like shield that would enable him to see the Gorgons without being instantly petrified. After this lengthy preparation, the hero was at last ready to take on the Medusa.
With his winged sandals he flew to the land of the Hyperboreans, and there he found the Gorgons sleeping. Gazing into his mirrored shield, Perseus approached them. As Athena guided his hand he struck off the monstrous head with one blow. From the blood of Medusa there sprang forth Pegasus, the winged horse, and a terrible warrior. Quickly Perseus put the head in his magic wallet and put on his helmet of invisibility. He did so in the nick of time, for immediately the other two Gorgons awoke. Seeing their slain sister, they set off to pursue and kill her murderer. But Perseus had no trouble eluding them, being able to fly without being seen.
He traveled south to Gibraltar and then east over Libya and Egypt. On the coast of Philistia he saw a beautiful, naked young woman chained to a rock. This was the princess Andromeda, who was awaiting execution at the hands of a sea-monster because her stupid, vain mother had claimed she was more lovely than the Nereids, or nymphs of the sea. Perseus fell in love with her and hastily arranged with her parents that if he could rescue her she would be his wife. When the monster appeared Perseus lopped its head off and freed Andromeda. Her parents, however, went back on their word, claiming that a previous suitor had a better right to their daughter. In addition, they summoned warriors to kill the hero. Since he found himself faced with too many enemies, Perseus drew the gory head from his wallet and transformed his antagonists to stone. Among them were Andromeda's parents, Cepheus and Cassiopia, who were turned into constellations for their treachery. But Perseus had acquired a wife.
