The Cumaean Sibyl was the priestess presiding over the oracle at Cumae, located near Naples, Italy. She owned nine books of prophecies and gave them to King Tarquin of Rome. He didn't like the price she offered; she threw three books into a fire and doubled the price. He still refused and she did the same. He was then forced to by the last three books at four times the original price.
It was said in some of the ancient poems that the whispers of the Sybil would be heard for a thousand years, and some have said that they will resound and echo for all eternity.