Men grew very wicked, owing to the evils in Pandora’s box, and Jupiter resolved to drown them all with a flood; but Prometheus, knowing it beforehand, told his mortal son Deucalion to build a ship and store it with all sorts of food.  In it Deucalion and his wife Pyrrha floated about for nine days till all men had been drowned, and as the waters went down the ship rested on Mount Parnassus, and Deucalion and Pyrrha came out and offered sacrifices to Jupiter.  He was appeased, and sent Mercury down to ask what he should grant them.  Their prayer was that the earth might be filled again with people, upon which the god bade them walk up the hill and throw behind them the bones of their grandmother.  Now Earth was said to be the mother of the Titans, so the bones of their grandmother were the rocks, so as they went they picked up stones and threw them over their shoulders.  All those that Deucalion threw rose up as men, and all those that Pyrrha threw became women, and thus the earth was alive again with human beings.  No one can fail to see what far older histories must have been brought in the minds of the Greeks, and have been altered into these tales, which have much beauty in themselves.  The story of the flood seems to have been mixed up with some small later inundation which only affected Greece.