The goddess Calypso has been keeping Odysseus on her island. Every day he has looked towards Ithaca and wept for home. The gods have at last sent to Calypso to release him. She wants to keep him for herself but agrees to help Odysseus build a raft and head off home. He keeps the constellation of Orion on his left as he sails and is 17 days from land when the sea god Poseidon notices what is happening and sends his fury into the sea. Odysseus is thrown overboard and into a wall of water. The gods help him again, this time with a magic veil. The raft is destroyed by an angry Poseidon, leaving Odysseus to swim and drift for two days, wearing the veil about his waist, before hearing surf on rocks and ultimately finding safety. He remembers just in time to throw the veil back to the goddess who had helped him. Exhausted and cold he finds a bed in the trees around him.
Imagine... the waters of the Aegean Sea. Crystal clear, turquoise and green. The cache is set beside a 'sea of green' where you might imagine Poseidon churning up the waters below Odysseus' raft. If you happen to hear a bird, or two, maybe it's the goddess, Leucothea, who appeared to Odysseus in the form of a bird.