When the legions had indulged their grief and repentance for the death of Probus, their unanimous consent declared Carus, his Praetorian praefect, the most deserving of the Imperial throne. Every circumstance that relates to this prince appears of a mixed and doubtful nature. He gloried in the title of Roman Citizen; and affected to compare the purity of his blood with the foreign and even barbarous origin of the preceding emperors; yet the most inquisitive of his contemporaries, very far from admitting his claim, have variously deduced his own birth, or that of his parents, from Illyricum, from Gaul, or from Africa. 64 Though a soldier, he had received a learned education; though a senator, he was invested with the first dignity of the army; and in an age when the civil and military professions began to be irrecoverably separated from each other, they were united in the person of Carus. Notwithstanding the severe justice which he exercised against the assassins of Probus, to whose favor and esteem he was highly indebted, he could not escape the suspicion of being accessory to a deed from whence he derived the principal advantage. He enjoyed, at least, before his elevation, an acknowledged character of virtue and abilities; 65 but his austere temper insensibly degenerated into moroseness and cruelty; and the imperfect writers of his life almost hesitate whether they shall not rank him in the number of Roman tyrants. 66 When Carus assumed the purple, he was about sixty years of age, and his two sons, Carinus and Numerian had already attained the season of manhood. 67
The authority of the senate expired with Probus; nor was the repentance of the soldiers displayed by the same dutiful regard for the civil power, which they had testified after the unfortunate death of Aurelian. The election of Carus was decided without expecting the approbation of the senate, and the new emperor contented himself with announcing, in a cold and stately epistle, that he had ascended the vacant throne. 68 A behavior so very opposite to that of his amiable predecessor afforded no favorable presage of the new reign: and the Romans, deprived of power and freedom, asserted their privilege of licentious murmurs. 69 The voice of congratulation and flattery was not, however, silent; and we may still peruse, with pleasure and contempt, an eclogue, which was composed on the accession of the emperor Carus. Two shepherds, avoiding the noontide heat, retire into the cave of Faunus. On a spreading beech they discover some recent characters. The rural deity had described, in prophetic verses, the felicity promised to the empire under the reign of so great a prince. Faunus hails the approach of that hero, who, receiving on his shoulders the sinking weight of the Roman world, shall extinguish war and faction, and once again restore the innocence and security of the golden age. 70
It is more than probable, that these elegant trifles never reached the ears of a veteran general, who, with the consent of the legions, was preparing to execute the long-suspended design of the Persian war. Before his departure for this distant expedition, Carus conferred on his two sons, Carinus and Numerian, the title of Caesar, and investing the former with almost an equal share of the Imperial power, directed the young prince, first to suppress some troubles which had arisen in Gaul, and afterwards to fix the seat of his residence at Rome, and to assume the government of the Western provinces. 71 The safety of Illyricum was confirmed by a memorable defeat of the Sarmatians; sixteen thousand of those barbarians remained on the field of battle, and the number of captives amounted to twenty thousand. The old emperor, animated with the fame and prospect of victory, pursued his march, in the midst of winter, through the countries of Thrace and Asia Minor, and at length, with his younger son, Numerian, arrived on the confines of the Persian monarchy. There, encamping on the summit of a lofty mountain, he pointed out to his troops the opulence and luxury of the enemy whom they were about to invade.
The successor of Artaxerxes, * Varanes, or Bahram, though he had subdued the Segestans, one of the most warlike nations of Upper Asia, 72 was alarmed at the approach of the Romans, and endeavored to retard their progress by a negotiation of peace. †
His ambassadors entered the camp about sunset, at the time when the troops were satisfying their hunger with a frugal repast. The Persians expressed their desire of being introduced to the presence of the Roman emperor. They were at length conducted to a soldier, who was seated on the grass. A piece of stale bacon and a few hard peas composed his supper. A coarse woollen garment of purple was the only circumstance that announced his dignity. The conference was conducted with the same disregard of courtly elegance. Carus, taking off a cap which he wore to conceal his baldness, assured the ambassadors, that, unless their master acknowledged the superiority of Rome, he would speedily render Persia as naked of trees as his own head was destitute of hair. 73 Notwithstanding some traces of art and preparation, we may discover in this scene the manners of Carus, and the severe simplicity which the martial princes, who succeeded Gallienus, had already restored in the Roman camps. The ministers of the Great King trembled and retired.
The threats of Carus were not without effect. He ravaged Mesopotamia, cut in pieces whatever opposed his passage, made himself master of the great cities of Seleucia and Ctesiphon, (which seemed to have surrendered without resistance,) and carried his victorious arms beyond the Tigris. 74 He had seized the favorable moment for an invasion. The Persian councils were distracted by domestic factions, and the greater part of their forces were detained on the frontiers of India. Rome and the East received with transports the news of such important advantages. Flattery and hope painted, in the most lively colors, the fall of Persia, the conquest of Arabia, the submission of Egypt, and a lasting deliverance from the inroads of the Scythian nations. 75 But the reign of Carus was destined to expose the vanity of predictions. They were scarcely uttered before they were contradicted by his death; an event attended with such ambiguous circumstances, that it may be related in a letter from his own secretary to the praefect of the city. “Carus,” says he, “our dearest emperor, was confined by sickness to his bed, when a furious tempest arose in the camp. The darkness which overspread the sky was so thick, that we could no longer distinguish each other; and the incessant flashes of lightning took from us the knowledge of all that passed in the general confusion. Immediately after the most violent clap of thunder, we heard a sudden cry that the emperor was dead; and it soon appeared, that his chamberlains, in a rage of grief, had set fire to the royal pavilion; a circumstance which gave rise to the report that Carus was killed by lightning. But, as far as we have been able to investigate the truth, his death was the natural effect of his disorder.” 76
The vacancy of the throne was not productive of any disturbance. The ambition of the aspiring generals was checked by their natural fears, and young Numerian, with his absent brother Carinus, were unanimously acknowledged as Roman emperors.
The public expected that the successor of Carus would pursue his father’s footsteps, and, without allowing the Persians to recover from their consternation, would advance sword in hand to the palaces of Susa and Ecbatana. 77 But the legions, however strong in numbers and discipline, were dismayed by the most abject superstition. Notwithstanding all the arts that were practised to disguise the manner of the late emperor’s death, it was found impossible to remove the opinion of the multitude, and the power of opinion is irresistible. Places or persons struck with