of the attack. But the vigilant citizens improved the opportunity of the night; and the return of day discovered a new wall of six feet in height, rising every moment to fill up the interval of the breach. Notwithstanding the disappointment of his hopes, and the loss of more than twenty thousand men, Sapor still pressed the reduction of Nisibis, with an obstinate firmness, which could have yielded only to the necessity of defending the eastern provinces of Persia against a formidable invasion of the Massagetæ. Alarmed by this intelligence, he hastily relinquished the siege, and marched with rapid diligence from the banks of the Tigris to those of the Oxus. The danger and difficulties of the Scythian war engaged him soon afterwards to conclude, or at least to observe, a truce with the Roman emperor, which was equally grateful to both princes; as Constantius himself, after the death of his two brothers, was involved, by the revolutions of the West, in a civil contest, which required and seemed to exceed the most vigorous exertion of his undivided strength.

After the partition of the empire, three years had scarcely elapsed before the sons of Constantine seemed impatient to convince mankind that they were incapable of contenting themselves with the dominions which they were unqualified to govern. The eldest of those princes soon complained, that he was defrauded of his just proportion of the spoils of their murdered kinsmen; and though he might yield to the superior guilt and merit of Constantius, he exacted from Constans the cession of the African provinces, as an equivalent for the rich countries of Macedonia and Greece, which his brother had acquired by the death of Dalmatius. The want of sincerity, which Constantine experienced in a tedious and fruitless negotiation, exasperated the fierceness of his temper; and he eagerly listened to those favorites, who suggested to him that his honor, as well as his interest, was concerned in the prosecution of the quarrel. At the head of a tumultuary band, suited for rapine rather than for conquest, he suddenly broke onto the dominions of Constans, by the way of the Julian Alps, and the country round Aquileia felt the first effects of his resentment. The measures of Constans, who then resided in Dacia, were directed with more prudence and ability. On the news of his brother's invasion, he detached a select and disciplined body of his Illyrian troops, proposing to follow them in person, with the remainder of his forces. But the conduct of his lieutenants soon terminated the unnatural contest. By the artful appearances of flight, Constantine was betrayed into an ambuscade, which had been concealed in a wood, where the rash youth, with a few attendants, was surprised, surrounded, and slain. His body, after it had been found in the obscure stream of the Alsa, obtained the honors of an Imperial sepulchre; but his provinces transferred their allegiance to the conqueror, who, refusing to admit his elder brother Constantius to any share in these new acquisitions, maintained the undisputed possession of more than two thirds of the Roman empire.

Part IV.

The fate of Constans himself was delayed about ten years longer, and the revenge of his brother's death was reserved for the more ignoble hand of a domestic traitor. The pernicious tendency of the system introduced by Constantine was displayed in the feeble administration of his sons; who, by their vices and weakness, soon lost the esteem and affections of their people. The pride assumed by Constans, from the unmerited success of his arms, was rendered more contemptible by his want of abilities and application. His fond partiality towards some German captives, distinguished only by the charms of youth, was an object of scandal to the people; and Magnentius, an ambitious soldier, who was himself of Barbarian extraction, was encouraged by the public discontent to assert the honor of the Roman name. The chosen bands of Jovians and Herculians, who acknowledged Magnentius as their leader, maintained the most respectable and important station in the Imperial camp. The friendship of Marcellinus, count of the sacred largesses, supplied with a liberal hand the means of seduction. The soldiers were convinced by the most specious arguments, that the republic summoned them to break the bonds of hereditary servitude; and, by the choice of an active and vigilant prince, to reward the same virtues which had raised the ancestors of the degenerate Constans from a private condition to the throne of the world. As soon as the conspiracy was ripe for execution, Marcellinus, under the pretence of celebrating his son's birthday, gave a splendid entertainment to the illustrious and honorablepersons of the court of Gaul, which then resided in the city of Autun. The intemperance of the feast was artfully protracted till a very late hour of the night; and the unsuspecting guests were tempted to indulge themselves in a dangerous and guilty freedom of conversation. On a sudden the doors were thrown open, and Magnentius, who had retired for a few moments, returned