Another orator, who, in his panegyric, treats so eloquently of the war against Maxentius, of the clemency which Constantine showed after the victory, and of the deliverance of Rome, says not a word on this apparition; while he assures us, that celestial armies were seen by all the Gauls, which armies, it was pretended, were sent to aid Constantine. This surprising vision has not only been unknown to Pagan authors, but to three Christian writers, who had the finest occasion to speak of them. Optatianus Porphyrius mentions more than once the monogram of Christ, which he calls the celestial sign, in the panegyric of Constantine which he wrote in Latin verse, but not a word on the appearance of the cross in the sky. Lactantius says nothing of it in his treatise on the "Death of Persecutors," which he composed towards the year 314, two years after the vision of which we speak; yet he must have been perfectly informed of all that regards Constantine, having been tutor to Crispus, the son of this prince. He merely relates, that Constantine was commanded, in a dream, to put the divine image of the cross on the bucklers of his soldiers, and to give up war: but in relating a dream, the truth of which had no other support than the evidence of the emperor, he passes, in silence over a prodigy to which all the army were witnesses. Further, Eusebius of Cæsarea himself, who has given the example to all other Christian historians on the subject, speaks not of this wonder, in the whole course of his "Ecclesiastical History," though he enlarges much on the exploits of Constantine against Maxentius. It is only in his life of this emperor that he expresses himself in these terms: "Constantine resolved to adore the god of Constantius; his father implored the protection of this god against Maxentius. Whilst he was praying, he had a wonderful vision, which would appear incredible, if related by another; but since the victorious emperor has himself related it to us, who wrote this history; and that, after having been long known to this prince, and enjoying a share in his good graces, the emperor confirming what he said by oath--who could doubt it? particularly since the event has confirmed the truth of it.