Terrible indeed was Medusa, the Gorgon, whose head Perseus had vowed to bring as a gift to Polydectes. She had great wings like eagles and sharp claws instead of hands. Now as Perseus wandered down to the shore after he had defied the king, his heart began to sink. How was he even to begin his task? He did not know where Medusa lived, nor did any one on the island. In his perplexity he did as his mother had taught him to do; he prayed to Athene, and lo! even as he prayed the goddess was there by his side. With her was Hermes, the fleet-footed, wearing his winged sandals. ‘The gods will aid you, Perseus,’ said Athene, ‘if you will do as they bid you. But think not to find their service easy. For they who serve the gods must endure hardship, and live laborious lives. Will this content you?’ Perseus had no fears now that he knew the gods would help him, and with a brave and steadfast heart he answered, ‘I am content.’ Then Pluto sent to the lad his magic helmet, which made whoever wore it invisible. Hermes gave to him the winged sandals he wore, so that he might be able to fly over land and sea, while Athene entrusted to him her shield, the dread Ægis, burnished bright as the sun. The shield was made from the hide of a goat, but the Hellenes thought of it as the great storm-cloud in which Zeus hid himself when he was angry. For it was the shield of her father Zeus that Athene used. Upon Medusa herself Perseus would not be able to cast a glance lest he be turned to stone, but looking at the shield he would see her image as in a mirror. The lad was now armed for his quest, but not yet did he know whither it would lead. But Athene could direct him. She said that the abode of the Gorgons was known to none save three sisters called the Grææ. These sisters had been born with grey hair, and had only one eye and one tooth between them, which they used in turn. Their home was in the north, in a land of perpetual darkness, and it was there that Perseus must go to learn the dwelling-place of the Gorgons. So at length the lad was ready to set out on his great adventure. On and on, sped by his winged sandals he flew, past many a fair town, until he left Greece far behind. On and on until he reached the dark and dreary land where the Grææ dwelt. He could see them now, the three grey sisters, as they sat in the gloom just outside their cave. As Perseus drew near, unseen by them, because of his magic helmet, the sisters were passing their one eye from hand to hand, so that at that moment all three were blind. Perseus saw his chance, and stretching out his hand seized the eye. They, each thinking the other had it, began to quarrel. But Perseus cried, ‘I hold the eye in my hand. Tell me where I may find Medusa and you shall have it back.’ The sisters were startled by a voice when they had neither seen nor heard any one approach; they were more startled by what the voice said.