The Oracle

King Acrisius of Argos was warned by an oracle that he would be killed in time by a son born to his daughter Danae. So he promptly locked Danae up in a tower. But the god Zeus got in, disguised as a shower of gold, with the result that Perseus was born. So Acrisius straightaway stuck daughter and infant into a chest and pushed it out to sea. Perhaps he expected it to sink like a stone, but instead it floated quite nicely, fetching up on a beach on the island of Seriphos.