Cronus was told by his father Uranus and Mother Earth that one of his own sons would someday dethrone him. For this reason, he swallowed the first five children that his wife, Rhea, bore him: Hestia, Demeter, Hera, Hades, and Poseidon. He meant to swallow the next child, Zeus, also, but the trickery of Rhea saved the baby. She substituted a stone wrapped in cloth for the baby and gave in to Cronus. Zeus was raised by nymphs and grew to manhood in secrecy of his father. Eventually, he returned home and became cup-bearer for Cronus. After drinking poison mixed into his drink by Zeus, Cronus vomited up his five children and a stone (Graves 12-13). This is how Poseidon came to the world.