The intelligence of the march and rapid progress of Julian was speedily transmitted to his rival, who, by the retreat of Sapor, had obtained some respite from the Persian war. Disguising the anguish of his soul under the semblance of contempt, Constantius professed his intention of returning into Europe, and of giving chase to Julian; for he never spoke of this military expedition in any other light than that of a hunting party. Ref. 043 In the camp of Hierapolis, in Syria, he communicated this design to his army, slightly mentioned the guilt and rashness of the Cæsar, and ventured to assure them that, if the mutineers of Gaul presumed to meet them in the field, they would be unable to sustain the fire of their eyes and the irresistible weight of their shout of onset. The speech of the emperor was received with military applause, and Theodotus, the president of the council of Hierapolis, requested, with tears of adulation, that his city might be adorned with the head of the vanquished rebel. Ref. 044 A chosen detachment was despatched away in post-waggons, to secure, if it were yet possible, the pass of Succi; the recruits, the horses, the arms, and the magazines which had been prepared against Sapor, were appropriated to the service of the civil war; and the domestic victories of Constantius inspired his partisans with the most sanguine assurances of success. The notary Gaudentius had occupied in his name the provinces of Africa; the subsistence of Rome was intercepted; and the distress of Julian was increased by an unexpected event which might have been productive of fatal consequences. Julian had received the submission of two legions and a cohort of archers, who were stationed at Sirmium; but he suspected, with reason, the fidelity of those troops, which had been distinguished by the emperor, and it was thought expedient, under the pretence of the exposed state of the Gallic frontier, to dismiss them from the most important scene of action. They advanced, with reluctance, as far as the confines of Italy; but, as they dreaded the length of the way and the savage fierceness of the Germans, they resolved, by the instigation of one of their tribunes, to halt at Aquileia, and to erect the banners of Constantius on the walls of that impregnable city. The vigilance of Julian perceived at once the extent of the mischief and the necessity of applying an immediate remedy. By his order, Jovinus led back a part of the army into Italy; and the siege of Aquileia was formed with diligence and prosecuted with vigour. But the legionaries, who seemed to have rejected the yoke of discipline, conducted the defence of the place with skill and perseverance; invited the rest of Italy to imitate the example of their courage and loyalty; and threatened the retreat of Julian, if he should be forced to yield to the superior numbers of the arms of the East. Ref. 045
But the humanity of Julian was preserved from the cruel alternative, which he pathetically laments, of destroying or of being himself destroyed: and the seasonable death of Constantius delivered the Roman empire from the calamities of civil war. The approach of winter could not detain the monarch at Antioch; and his favourites durst not oppose his impatient desire of revenge. A slight fever, which was perhaps occasioned by the agitation of his spirits, was increased by the fatigues of the journey; and Constantius was obliged to halt at the little town of Mopsucrene, twelve miles beyond Tarsus, where he expired, after a short illness, in the forty-fifth year of his age, and the twenty-fourth of his reign. Ref. 046 His genuine character, which was composed of pride and weakness, of superstition and cruelty, has been fully displayed in the preceding narrative of civil and ecclesiastical events. The long abuse of power rendered him a considerable object in the eyes of his contemporaries; but, as personal merit can alone deserve the notice of posterity, the last of the sons of Constantine may be dismissed from the world with the remark, that he inherited the defects, without the abilities, of his father. Before Constantius expired, he is said to have named Julian for his successor; nor does it seem improbable that his anxious concern for the fate of a young and tender wife, whom he left with child, may have prevailed, in his last moments, over the harsher passions of hatred and revenge. Eusebius, and his guilty associates, made a faint attempt to prolong the reign of the eunuchs by the election of another emperor: but their intrigues were rejected with disdain by an army which now abhorred the thought of civil discord; and two officers of rank were instantly despatched, to assure Julian that every sword in the empire would be drawn for his service. The military designs of that prince, who had formed three different attacks against Thrace, were prevented by this fortunate event. Without shedding the blood of his fellow-citizens, he escaped the dangers of a doubtful conflict and acquired the advantages of a complete victory. Impatient to visit the place of his birth and the new capital of the empire, he advanced from Naissus through the mountains of Hæmus and the cities of Thrace. When he reached Heraclea, at the distance of sixty miles, all Constantinople was poured forth to receive him; and he made his triumphal entry, amidst the dutiful acclamations of the soldiers, the people, and the senate. An innumerable multitude pressed around him with eager respect; and were perhaps disappointed when they beheld the small stature and simple garb of a hero whose unexperienced youth had vanquished the Barbarians of Germany, and who had now traversed, in a successful career, the whole continent of Europe, from the shores of the Atlantic to those of the Bosphorus. Ref. 047 A few days afterwards, when the remains of the deceased emperor were landed in the harbour, the subjects of Julian applauded the real or affected humanity of their sovereign. On foot, without his diadem, and clothed in a mourning habit, he accompanied the funeral as far as the church of the Holy Apostles, where the body was deposited: and, if these marks of respect may be interpreted as a selfish tribute to the birth and dignity of his Imperial kinsman, the tears of Julian professed to the world that he had forgot the injuries, and remembered only the obligations, which he had received from Constantius. Ref. 048 As soon as the legions of Aquileia were assured of the death of the emperor, they opened the gates of the city, and, by the sacrifice of their guilty leaders, obtained an easy pardon from the prudence or lenity of Julian; who, in the thirty-second year of his age, acquired the undisputed possession of the Roman empire. Ref. 049
Philosophy had instructed Julian to compare the advantages of action and retirement; but the elevation of his birth and the accidents of his life never allowed him the freedom of choice. He might perhaps sincerely have preferred the groves of the academy and the society of Athens; but he was constrained, at first by the will, and afterwards by the injustice, of Constantius, to expose his person and fame to the dangers of Imperial greatness; and to make himself accountable to the world, and to posterity, for the happiness of millions. Ref. 050 Julian recollected with terror the observation of his master Plato, Ref. 051 that the government of our flocks and herds is always committed to beings of a superior species; and that the conduct of nations requires and deserves the celestial powers of the Gods or of the Genii. From this principle he justly concluded that the man who presumes to reign should aspire to the perfection of the divine nature; that he should purify his soul from her mortal and terrestrial part; that he should extinguish his appetites, enlighten his understanding, regulate his passions, and subdue the wild beast which, according to the lively metaphor of Aristotle, Ref. 052 seldom fails to ascend the throne of a despot. The throne of Julian, which the death of Constantius fixed on an independent basis, was the seat of reason, of virtue, and perhaps of vanity. He despised the honours, renounced