there was no risk, there was even an advantage, in shewing their colours; it set them right both with the new Emperor and with public opinion. But it was not enough for Hilary’s purpose that the ‘inward evil’ of a wavering faith should be amended; it was also necessary that avowed heresy should be expelled. For this the co-operation of Julian was necessary; and before it was granted Julian might naturally look for some definite pronouncement on Hilary’s part. To this conjuncture, in the latter half of the year 360 or the earlier part of 361, we may best assign the publication of the Invective, already described, against Constantius. It was a renunciation of allegiance to his old master, not the less clear because the new is not mentioned. And with the name of Constantius was coupled that of Saturninus, as his abettor in tyranny and misbelief. Julian recognised the value of the Catholic alliance by giving effect to the decision of a Council held at Paris, which deposed Saturninus. Hilary had no ecclesiastical authority to gather such a Council, but his character and the eminence of his services no doubt rendered his colleagues willing to follow him; yet neither he nor they would have acted as they did without the assurance of Julian’s support. Their action committed them irrevocably to Julian’s cause; and it must have seemed that his expulsion of Saturninus committed him irrevocably to the orthodox side. Yet Julian impartially disbe- lieving both creeds, had made the ostensible cause of Saturninus’ exile not his errors of faith, but some of those charges of misconduct which were always forthcoming when a convenient excuse was wanted for the banishment of a bishop. Saturninus was a man of the world, and very possibly his Arianism was only assumed in aid of his ambition; it is likely enough that his conduct furnished sufficient grounds for his punishment. The fall of its chief, Sulpicius Severus says, destroyed the party. The other Arian prelates, who must have been few in number, submitted to the orthodox tests, with one exception. Paternus of Périgord, a man of no fame, had the courage of his convictions. He stubbornly asserted his belief, and shared the fate of Saturninus. Thus Hilary obtained, what he had failed to get in the case of the xl more prominent offender, a clear precedent for the deposition of bishops guilty of Arianism. The synodical letter, addressed to the Eastern bishops in reply to letters which some of them had sent to Hilary since his return, was incorporated by him in his History, to be mentioned hereafter102. The bishops of Gaul assert their orthodoxy, hold Auxentius, Valens, Ursacius and their like excommunicate, and have just excommunicated Saturninus. By his action at Paris, so Sulpicius says, Hilary earned the glory that it was by his single exertions that the provinces of Gaul were cleansed from the defilements of heresy103. These events happened before Julian left the country, in the middle of the summer of 361, on his march against Constantius; or at least, if the actual proceedings were subsequent to his departure, they must have quickly followed it, for his sanction was necessary, and 102 Fragment xi. 103 Chron. ii. 45. 57 The Life and Writings of St. Hilary of Poitiers.