"The ruler of Da Qin is not permanent. When disasters result from unusual phenomena, they unceremoniously replace him, installing a virtuous man as king, and release the old king, who does not dare show resentment..."Here we have the words of the early third century Chinese historian Yu Huan, who lived during the Three Kingdoms period of Chinese history. Though he never left China, he collected large amounts of information on the countries to the West, chief among them the Roman Empire.Enormous thanks to John E. Hill for kindly allowing us to use his translation, and for tips on the possible...