Goths; but it was dangerous to trust or to pardon these perfidious barbarians, whose formidable power kept Italy itself in perpetual alarms.

Immediately after this conference, it should seem that some unexpected emergency required the emperor's presence in Pannonia. He devolved on his lieutenants the care of finishing the destruction of the Alemanni, either by the sword, or by the surer operation of famine. But an active despair has often triumphed over the indolent assurance of success. The barbarians, finding it impossible to traverse the Danube and the Roman camp, broke through the posts in their rear, which were more feebly or less carefully guarded; and with incredible diligence, but by a different road, returned towards the mountains of Italy. Aurelian, who considered the war as totally extinguished, received the mortifying intelligence of the escape of the Alemanni, and of the ravage which they already committed in the territory of Milan. The legions were commanded to follow, with as much expedition as those heavy bodies were capable of exerting, the rapid flight of an enemy whose infantry and cavalry moved with almost equal swiftness. A few days afterwards, the emperor himself marched to the relief of Italy, at the head of a chosen body of auxiliaries, (among whom were the hostages and cavalry of the Vandals,) and of all the Prætorian guards who had served in the wars on the Danube.

As the light troops of the Alemanni had spread themselves from the Alps to the Apennine, the incessant vigilance of Aurelian and his officers was exercised in the discovery, the attack, and the pursuit of the numerous detachments. Notwithstanding this desultory war, three considerable battles are mentioned, in which the principal force of both armies was obstinately engaged. The success was various. In the first, fought near Placentia, the Romans received so severe a blow, that, according to the expression of a writer extremely partial to Aurelian, the immediate dissolution of the empire was apprehended. The crafty barbarians, who had lined the woods, suddenly attacked the legions in the dusk of the evening, and, it is most probable, after the fatigue and disorder of a long march. The fury of their charge was irresistible; but, at length, after a dreadful slaughter, the patient firmness of the emperor rallied his troops, and restored, in some degree, the honor of his arms. The second battle was fought near Fano in Umbria; on the spot which, five hundred years before, had been fatal to the brother of Hannibal. Thus far the successful Germans had advanced along the Æmilian and Flaminian way, with a design of sacking the defenceless mistress of the world. But Aurelian, who, watchful for the safety of Rome, still hung on their rear, found in this place the decisive moment of giving them a total and irretrievable defeat. The flying remnant of their host was exterminated in a third and last battle near Pavia; and Italy was delivered from the inroads of the Alemanni.

Fear has been the original parent of superstition, and every new calamity urges trembling mortals to deprecate the wrath of their invisible enemies. Though the best hope of the republic was in the valor and conduct of Aurelian, yet such was the public consternation, when the barbarians were hourly expected at the gates of Rome, that, by a decree of the senate the Sibylline books were consulted. Even the emperor himself from a motive either of religion or of policy, recommended this salutary measure, chided the tardiness of the senate, and offered to supply whatever expense, whatever animals, whatever captives of any nation, the gods should require. Notwithstanding this liberal offer, it does not appear, that any human victims expiated with their blood the sins of the Roman people. The Sibylline books enjoined ceremonies of a more harmless nature, processions of priests in white robes, attended by a chorus of youths and virgins; lustrations of the city and adjacent country; and sacrifices, whose powerful influence disabled the barbarians from passing the mystic ground on which they had been celebrated. However puerile in themselves, these superstitious arts were subservient to the success of the war; and if, in the decisive battle of Fano, the Alemanni fancied they saw an army of spectres combating on the side of Aurelian, he received a real and effectual aid from this imaginary reenforcement.

But whatever confidence might be placed in ideal ramparts, the experience of the past, and the dread of the future, induced the Romans to construct fortifications of a grosser and more substantial kind. The seven hills of Rome had been surrounded, by the successors of Romulus, with an ancient wall of more than thirteen miles. The vast enclosure may seem disproportioned to the strength and numbers of the infant state. But it was necessary to secure an ample extent of pasture and arable land, against