They were protected from the sun and rain by an ample canopy, occasionally drawn over their heads. The air was continally refreshed by the playing of fountains, and profusely impregnated by the grateful scent of aromatics. In the centre of the edifice, the arena, or stage, was strewed with the finest sand, and successively assumed the most different forms. At one moment it seemed to rise out of the earth, like the garden of the Hesperides, and was afterwards broken into the rocks and caverns of Thrace. The subterraneous pipes conveyed an inexhaustible supply of water; and what had just before appeared a level plain, might be suddenly converted into a wide lake, covered with armed vessels, and replenished with the monsters of the deep. 95 In the decoration of these scenes, the Roman emperors displayed their wealth and liberality; and we read on various occasions that the whole furniture of the amphitheatre consisted either of silver, or of gold, or of amber. 96 The poet who describes the games of Carinus, in the character of a shepherd, attracted to the capital by the fame of their magnificence, affirms that the nets designed as a defence against the wild beasts, were of gold wire; that the porticos were gilded; and that the belt or circle which divided the several ranks of spectators from each other was studded with a precious mosaic of beautiful stones. 97
In the midst of this glittering pageantry, the emperor Carinus, secure of his fortune, enjoyed the acclamations of the people, the flattery of his courtiers, and the songs of the poets, who, for want of a more essential merit, were reduced to celebrate the divine graces of his person. 98 In the same hour, but at the distance of nine hundred miles from Rome, his brother expired; and a sudden revolution transferred into the hands of a stranger the sceptre of the house of Carus. 99
The sons of Carus never saw each other after their father’s death. The arrangements which their new situation required were probably deferred till the return of the younger brother to Rome, where a triumph was decreed to the young emperors for the glorious success of the Persian war. 100 It is uncertain whether they intended to divide between them the administration, or the provinces, of the empire; but it is very unlikely that their union would have proved of any long duration. The jealousy of power must have been inflamed by the opposition of characters. In the most corrupt of times, Carinus was unworthy to live: Numerian deserved to reign in a happier period. His affable manners and gentle virtues secured him, as soon as they became known, the regard and affections of the public. He possessed the elegant accomplishments of a poet and orator, which dignify as well as adorn the humblest and the most exalted station. His eloquence, however it was applauded by the senate, was formed not so much on the model of Cicero, as on that of the modern declaimers; but in an age very far from being destitute of poetical merit, he contended for the prize with the most celebrated of his contemporaries, and still remained the friend of his rivals; a circumstance which evinces either the goodness of his heart, or the superiority of his genius. 101 But the talents of Numerian were rather of the contemplative than of the active kind. When his father’s elevation reluctantly forced him from the shade of retirement, neither his temper nor his pursuits had qualified him for the command of armies. His constitution was destroyed by the hardships of the Persian war; and he had contracted, from the heat of the climate, 102 such a weakness in his eyes, as obliged him, in the course of a long retreat, to confine himself to the solitude and darkness of a tent or litter.
The administration of all affairs, civil as well as military, was devolved on Arrius Aper, the Praetorian praefect, who to the power of his important office added the honor of being father-in-law to Numerian. The Imperial pavilion was strictly guarded by his most trusty adherents; and during many days, Aper delivered to the army the supposed mandates of their invisible sovereign. 103
It was not till eight months after the death of Carus, that the Roman army, returning by slow marches from the banks of the Tigris, arrived on those of the Thracian Bosphorus. The legions halted at Chalcedon in Asia, while the court passed over to Heraclea, on the European side of the Propontis. 104 But a report soon circulated through the camp, at first in secret whispers, and at length in loud clamors, of the emperor’s death, and of the presumption of his ambitious minister, who still exercised the sovereign power in the name of a prince who was no more. The impatience of the soldiers could not long support a state of suspense. With rude curiosity they broke into the Imperial tent, and discovered only the corpse of Numerian. 105 The gradual decline of his health might have induced them to believe that his death was natural; but the concealment was interpreted as an evidence of guilt, and the measures which Aper had taken to secure his election became the immediate occasion of his ruin Yet, even in the transport of their rage and grief, the troops observed a regular proceeding, which proves how firmly discipline had been reestablished by the martial successors of Gallienus. A general assembly of the army was appointed to be held at Chalcedon, whither Aper was transported in chains, as a prisoner and a criminal. A vacant tribunal was erected in the midst of the camp, and the generals and tribunes formed a great military council. They soon announced to the multitude that their choice had fallen on Diocletian, commander of the domestics or body-guards, as the person the most capable of revenging and succeeding their beloved emperor. The future fortunes of the candidate depended on the chance or conduct of the present hour. Conscious that the station which he had filled exposed him to some suspicions, Diocletian ascended the tribunal, and raising his eyes towards the Sun, made a solemn profession of his own innocence, in the presence of that all-seeing Deity. 106 Then, assuming the tone of a sovereign and a judge, he commanded that Aper should be brought in chains to the foot of the tribunal. “This man,” said he, “is the murderer of Numerian;” and without giving him time to enter on a dangerous justification, drew his sword, and buried it in the breast of the unfortunate praefect. A charge supported by such decisive proof was admitted without contradiction, and the legions, with repeated acclamations, acknowledged the justice and authority of the emperor Diocletian. 107 104 We are obliged to the Alexandrian Chronicle, p. 274, for the knowledge of the time and place where Diocletian was elected emperor.]
Before we enter upon the memorable reign of that prince, it will be proper to punish and dismiss the unworthy brother of Numerian. Carinus possessed arms and treasures sufficient to support his legal title to the empire. But his personal vices overbalanced every advantage of birth and situation. The most faithful servants of the father despised the incapacity, and dreaded the cruel arrogance, of the son. The hearts of the people were engaged in favor of his rival, and even the senate was inclined to prefer a usurper to a tyrant. The arts of Diocletian inflamed the general discontent; and the winter was employed in secret intrigues, and open preparations for a civil war. In the spring, the forces of the East and of the West encountered each other in the plains of Margus, a small city of Maesia, in the neighborhood of the Danube.