It was probably in the year 120, three years after his accession to the empire, that Hadrian visited Britain. The journey may have been only part of his pre-arranged tour through the western portion of his dominions, but it is also possible that it was the result of some recent and special disaster in Britain to the Roman arms. Some forty or fifty years afterwards the orator Fronto alluded to “the great number of soldiers slain by the Britons during the reign of Hadrian,” and it is allowable at least as a matter of conjecture to couple these words with the ominous disappearance of one of the legions stationed in Britain from the army list of the empire. The unlucky Ninth legion, once quartered at Lincoln, afterwards at York, had been, as we have seen, nearly destroyed in the insurrection headed by Boadicea. It had again suffered most severely, under Agricola, from a night attack made by the Caledonians before the battle of Mons Graupius. And now, just about this time, either in the later years of Trajan or the earlier years of Hadrian, it vanishes clean out of the lists of the Roman army and is replaced by the Sixth legion, surnamed the Victorious, which was brought over to Britain and stationed at Eburacum. There is some discussion as to the earlier cantonment of the legions, whether four or three, that had been quartered in Britain, but as to the general question of their allocation during, at least, the second and third centuries of our era there can be no doubt. The Second legion (_Augusta_) at Isca (Caerleon-upon-Usk); the Sixth (_Victrix_) at Eburacum (York), and the Twentieth (_Valeria Victrix_) at Deva (Chester), have left abundant tokens of their long-continued presence.