The existing military road along the line of the Wall does not follow the track of its Roman predecessor. It was constructed after the rebellion of 1745, when the Scots were able to invade England by Carlisle before our very superior forces at Newcastle could get across the pathless waste between to intercept them.
Mithraism is first heard of in the 2nd century A.D., as an eccentric cult having many of the features of Christianity, especially the sense of Sin and the doctrine that the vicarious blood-shedding essential to remission must be connected with a New Baptismal Birth unto Righteousness. The Mithraists carried out this idea by the highly realistic ceremonies of the Taurobolium; the penitent neophyte standing beneath a grating on which the victim was slain, and thus being literally bathed in the atoning blood, afterwards being considered as born again [renatus]. It thus evolved a real and heartfelt devotion to the Supreme Being, whom, however (unlike Christianity), it was willing to worship under the names of the old Pagan Deities; frequently combining their various attributes in joint Personalities of unlimited complexity. One figure has the head of Jupiter, the rays of Phoebus, and the trident of Neptune; another is furnished with the wings of Cupid, the wand of Mercury, the club of Hercules, and the spear of Mars; and so forth. Mithraism thus escaped the persecution which the essential exclusiveness of their Faith drew down upon Christians; gradually transforming by its deeper spirituality the more frigid cults of earlier Paganism, and making them its own. The little band of truly noble men and women who in the latter half of the 4th century made the last stand against the triumph of Christianity over the Roman world were almost all Mithraists. For a good sketch of this interesting development see Dill, 'Roman Society in the Last Century of the Western Empire.'
Of the 1200 in the 'Corpus Inscript. Lat.' (vol. vii.), 500 are in the section Per Lineam Valli.