Short story on Julius Caesar

While sailing to Greece for further study, Caesar was kidnaped by Cilician pirates and held for ransom. When informed that they intended to ask for 20 talents, he is supposed to have insisted that he was worth at least 50. He maintained a friendly, joking relationship with the pirates while the money was being raised, but warned them that he would track them down and have them crucified after he was released. He did just that, with the help of volunteers, as a warning to other pirates, but he first cut their throats to lessen their suffering because they had treated him well.