Herodian (late second, first half third century): Greek historian, author of a History of the Roman Empire since the Death of Marcus Aurelius in which he describes the reign of Commodus (180-192), the Year of the Five Emperors (193), the age of the Severan dynasty (211-235), and the Year of the Six Emperors (238).
The translation was made by Edward C. Echols (Herodian of Antioch's History of the Roman Empire, 1961 Berkeley and Los Angeles) and was put online for the first time by Roger Pearse (Tertullian.Org). The version offered on these pages is hyperlinked and contains notes by Jona Lendering.
Commodus' Plans for the New Year
[1.16.1]  But the time had finally come for Commodus to cease his mad antics and for the Roman empire to be rid of this tyrant. This occurred on the first day of the new year, when the Romans celebrate the festival which they trace back to the most ancient of the Italic native gods. They believe that Saturn, ousted from his realm by Jupiter, came down to earth and was the guest of Janus. Fearful of his son's power, he escaped when Janus hid him.
[1.16.2] This episode gave the region of Latium its name, which is derived from the Greek word lathein, "to escape notice."note[The Romans derived it from Latin latere, "to be in hiding".] For this reason the Italians continue to celebrate the Saturnalia down to the present time, to commemorate the sheltering of the god, and they observe at the beginning of the year the festival of the Italic god Janus. The statues of Janus have two faces because the year begins and ends with him. On the day of this festival the Romans go out of their way to greet each other and exchange gifts.
[1.16.3] On this day, too, they dine together gaily on the delicacies of land and sea. This is also the day on which the consuls who give their names to the year first don the purple robes of office for their one-year term. When all were occupied in the celebration, Commodus had it in mind to appear not from the imperial palace, in the customary fashion, but from the gladiatorial barracks, clad in armor instead of in the splendid imperial purple, and accompanied by the rest of the gladiators.
[1.16.4] He announced his intentions to Marcia, whom, of all his mistresses, he held in highest esteem; he kept nothing from this woman, as if she were his legal wife, even allowing her the imperial honors except for the sacred fire. When she learned of his plan, so unreasonable and unbecoming an emperor, she threw herself at his feet, entreating him, with tears, not to bring disgrace upon the Roman empire and not to endanger his life by entrusting it to gladiators and desperate men. After much pleading, unable to persuade the emperor to abandon his plan, she left him, still weeping.
[1.16.5] Commodus then summoned Laetus, the praetorian prefect, and Eclectus, his bedroom steward, and ordered them to make arrangements for him to spend the night in the gladiatorial barracks, telling them that he would leave for the festival sacrifices from there, and show himself to the Romans under arms. And these men, too, pleaded with the emperor not to do anything unworthy of his imperial position.