Acrisius mounted his chariot, sad and sorry, and was driven homewards. On the way he never spoke a word, but was thinking how he might escape from the prophecy, and baffle the will of Zeus, the chief of the gods. He did not know that Zeus himself had looked down upon Danae and fallen in love with her, nor did Danae know.

The only sure way to avoid the prophecy was to kill Danae, and Acrisius thought of doing this; but he loved her too much; and he was afraid that his people would rise against him, if he slew his daughter, the pride of their hearts. Still another fear was upon Acrisius, which will be explained later in the story. He could think of nothing better than to build a house all of bronze, in the court of his palace, a house sunk deep in the earth, but with part of the roof open to the sky, as was the way in all houses then; the light came in from above, and the smoke of the fire went out in the same way. This chamber Acrisius built, and in it he shut up poor Danae with the woman that had been her nurse. They saw nothing, hills or plains or sea, men or trees, they only saw the sun at midday, and the sky, and the free birds flitting across it. There Danae lay, and was weary and sad, and she could not guess why her father thus imprisoned her. He used to visit her often and seemed kind and sorry for her, but he would never listen when she implored him to sell her for a slave into a far country, so that, at least, she might see the world in which she lived.

Now on a day a mysterious thing happened; the old poet Pindar, who lived long after, in the time of the war between the Greeks and the King of Persia, says that a living stream of gold flowed down from the sky and filled the chamber of Danae. Some time after this Danae bore a baby, a son, the strongest and most beautiful of children. She and her nurse kept it secret, and the child was brought up in an inner chamber of the house of bronze. It was difficult to prevent so lively a child from making a noise in his play, and one day, when Acrisius was with Danae, the boy, now three or four years old, escaped from his nurse, and ran from her room, laughing and shouting. Acrisius rushed out, and saw the nurse catch the child, and throw her mantle over him. Acrisius seized the boy, who stood firm on his little legs, with his head high, frowning at his grandfather, and gazing in anger out of his large blue eyes. Acrisius saw that this child would be dangerous when he became a man, and in great anger he bade his guards take the nurse out, and strangle her with a rope, while Danae knelt weeping at his feet.

When they were alone he said to Danae: 'Who is the father of this child?' but she, with her boy on her arm, slipped past Acrisius, and out of the open door, and up the staircase, into the open air. She ran to the altar of Zeus, which was built in the court, and threw her arms round it, thinking that there no man dared to touch her. 'I cry to Zeus that is throned in the highest, the Lord of Thunder,' she said: 'for he and no other is the father of my boy, even Perseus.' The sky was bright and blue without a cloud, and Danae cried in vain. There came no flash of lightning nor roll of thunder.

'Is it even so?' said Acrisius, 'then let Zeus guard his own.' He bade his men drag Danae from the altar; and lock her again in the house of bronze; while he had a great strong chest made. In that chest he had the cruelty to place Danae and her boy, and he sent them out to sea in a ship, the sailors having orders to let the chest down into the waters when they were far from shore. They dared not disobey, but they put food and a skin of wine, and two skins of water in the chest, and lowered it into the sea, which was perfectly calm and still. It was their hope that some ship would come sailing by, perhaps a ship of Phœnician merchant-men, who would certainly save Danae and the child, if only that they might sell them for slaves.

King Acrisius himself was not ignorant that this might happen, and that his grandson might live to be the cause of his death. But the Greeks believed that if any man killed one of his own kinsfolk, he would be pursued and driven mad by the Furies called the Erinyes, terrible winged women with cruel claws. These winged women drove Orestes, the son of Agamemnon, fleeing like a madman through the world, because he slew his own mother, Clytaemnestra, to avenge his father, whom she and Ægisthus had slain. Nothing was so much dreaded as these Furies, and therefore Acrisius did not dare to slay his daughter and his grandson, Perseus, but only put them in the way of being drowned. He heard no more of them, and hoped that both of their bodies were rolling in the waves, or that their bones lay bleaching on some unknown shore. But he could not be certain—indeed, he soon knew better—and as long as he lived, he lived in fear that Perseus had escaped, and would come and slay him, as the prophetess had said in her song.

The chest floated on the still waters, and the sea birds swooped down to look at it, and passed by, with one waft of their wings. The sun set, and Danae watched the stars, the Bear and Orion with his belt, and wrapped her boy up warm, and he slept sound, for he never knew fear, in his mother's arms. The Dawn came in her golden throne, and Danae saw around her the blue sharp crests of the mountains of the islands that lay scattered like water lilies on the seas of Greece. If only the current would drift her to an island, she thought, and prayed in her heart to the Gods of Good Help, Pallas Athênê, and Hermes of the Golden Wand. Soon she began to hope that the chest was drawing near an island. She turned her head in the opposite direction for a long while, and then looked forward again. She was much nearer the island, and could see the smoke going up from cottages among the trees. But she drifted on and drifted past the end of the isle, and on with the current, and so all day.

A weary day she had, for the boy was full of play, and was like to capsize the chest. She gave him some wine and water, and presently he fell asleep, and Danae watched the sea and the distant isles till night came again. It was dark, with no moon, and the darker because the chest floated into the shadow of a mountain, and the current drew it near the shore. But Danae dared not hope again; men would not be abroad, she thought, in the night. As she lay thus helpless, she saw a light moving on the sea, and she cried as loud as she could cry. Then the light stopped, and a man's shout came to her over the water, and the light moved swiftly towards her. It came from a brazier set on a pole in a boat, and now Danae could see the bright sparks that shone in the drops from the oars, for the boat was being rowed towards her, as fast as two strong men could pull.

Being weak from the heat of the sun that had beaten on her for two days, and tired out with hopes and fears, Danae fainted, and knew nothing till she felt cold water on her face. Then she opened her eyes, and saw kind eyes looking at her own, and the brown face of a bearded man, in the light of the blaze that fishermen carry in their boats at night, for the fish come to wonder at it, and the fishermen spear them. There were many dead fish in the boat, into which Danae and the child had been lifted, and a man with a fish spear in his hand was stooping over her.

Then Danae knew that she and her boy were saved, and she lay, unable to speak, till the oarsmen had pulled their boat to a little pier of stone. There the man with the fish spear lifted her up lightly and softly set her on her feet on land, and a boatman handed to him the boy, who was awake, and was crying for food.