While the Roman emperor and the Persian monarch, at the distance of three thousand miles, defended their extreme limits against the Barbarians of the Danube and of the Oxus, their intermediate frontier experienced the vicissitudes of a languid war, and a precarious truce. Two of the eastern ministers of Constantius, the Prætorian præfect Musonian, whose abilities were disgraced by the want of truth and integrity, and Cassian, duke of Mesopotamia, a hardy and veteran soldier, opened a secret negotiation with the satrap Tamsapor. 49 4911 These overtures of peace, translated into the servile and flattering language of Asia, were transmitted to the camp of the Great King; who resolved to signify, by an ambassador, the terms which he was inclined to grant to the suppliant Romans. Narses, whom he invested with that character, was honorably received in his passage through Antioch and Constantinople: he reached Sirmium after a long journey, and, at his first audience, respectfully unfolded the silken veil which covered the haughty epistle of his sovereign. Sapor, King of Kings, and Brother of the Sun and Moon, (such were the lofty titles affected by Oriental vanity,) expressed his satisfaction that his brother, Constantius Cæsar, had been taught wisdom by adversity. As the lawful successor of Darius Hystaspes, Sapor asserted, that the River Strymon, in Macedonia, was the true and ancient boundary of his empire; declaring, however, that as an evidence of his moderation, he would content himself with the provinces of Armenia and Mesopotamia, which had been fraudulently extorted from his ancestors. He alleged, that, without the restitution of these disputed countries, it was impossible to establish any treaty on a solid and permanent basis; and he arrogantly threatened, that if his ambassador returned in vain, he was prepared to take the field in the spring, and to support the justice of his cause by the strength of his invincible arms. Narses, who was endowed with the most polite and amiable manners, endeavored, as far as was consistent with his duty, to soften the harshness of the message. 50 Both the style and substance were maturely weighed in the Imperial council, and he was dismissed with the following answer: “Constantius had a right to disclaim the officiousness of his ministers, who had acted without any specific orders from the throne: he was not, however, averse to an equal and honorable treaty; but it was highly indecent, as well as absurd, to propose to the sole and victorious emperor of the Roman world, the same conditions of peace which he had indignantly rejected at the time when his power was contracted within the narrow limits of the