The Goddess Athena helping Jason's ship, terracotta relief, British Museum [Credit: Townley Collection, cc. lic. Wikimedia] The golden fleece. Ancient gold prospectors placed sheepskins in swiftly running streams, and in the fleece were trapped alluvial gold washed from lodes in the mountains by winter rains. A sheepskin left for a time in a gold rich area would become literally golden. The sheepskins in ancient times were then, archaeologists think, kept for safekeeping in a temple.