The Imperial slave was eager to secure the favor of his master by an act of treason to his native country. He conducted Sapor over the Euphrates, and, by the way of Chalcis, to the metropolis of the East. So rapid were the motions of the Persian cavalry, that, if we may credit a very judicious historian, the city of Antioch was surprised when the idle multitude was fondly gazing on the amusements of the theatre. The splendid buildings of Antioch, private as well as public, were either pillaged or destroyed; and the numerous inhabitants were put to the sword, or led away into captivity. The tide of devastation was stopped for a moment by the resolution of the high priest of Emesa. Arrayed in his sacerdotal robes, he appeared at the head of a great body of fanatic peasants, armed only with slings, and defended his god and his property from the sacrilegious hands of the followers of Zoroaster. But the ruin of Tarsus, and of many other cities, furnishes a melancholy proof that, except in this singular instance, the conquest of Syria and Cilicia scarcely interrupted the progress of the Persian arms. The advantages of the narrow passes of Mount Taurus were abandoned, in which an invader, whose principal force consisted in his cavalry, would have been engaged in a very unequal combat: and Sapor was permitted to form the siege of Cæsarea, the capital of Cappadocia; a city, though of the second rank, which was supposed to contain four hundred thousand inhabitants. Demosthenes commanded in the place, not so much by the commission of the emperor, as in the voluntary defence of his country. For a long time he deferred its fate; and when at last Cæsarea was betrayed by the perfidy of a physician, he cut his way through the Persians, who had been ordered to exert their utmost diligence to take him alive. This heroic chief escaped the power of a foe who might either have honored or punished his obstinate valor; but many thousands of his fellow-citizens were involved in a general massacre, and Sapor is accused of treating his prisoners with wanton and unrelenting cruelty. Much should undoubtedly be allowed for national animosity, much for humbled pride and impotent revenge; yet, upon the whole, it is certain, that the same prince, who, in Armenia, had displayed the mild aspect of a legislator, showed himself to the Romans under the stern features of a conqueror. He despaired of making any permanent establishment in the empire, and sought only to leave behind him a wasted desert, whilst he transported into Persia the people and the treasures of the provinces.