On the other hand, not only do statements to the effect alleged occur frequently in Ossian, but whole poems are founded on the assumption of their truth, and cannot be understood without them. Why then are not these taken into account by our geologists as contemporaneous testimony, in the same way as similar statements, if they had occurred in Cæsar or in Tacitus, would have been? Because Ossian hitherto has been looked upon by men of science as a fable; as a witness utterly unfit to be produced in court, and no more to be cared for or quoted in an ordnance survey, or in a professor's chair, than the Arabian Nights' Entertainments are in a pulpit. By which very oversight or contempt, the most important revelations have been lost, and the most elaborate theories will soon be rendered useless. Ossian, in fact, is as much an authority as either Cæsar, or Tacitus, or Ptolemy; and in estimating the physical conditions of the world to which he refers, and which he describes, can no longer be either ignored or doubted. If his text seems to be at variance with existing facts, it must be more carefully studied; and if new theories are required to harmonise details they must be accepted or invented. We have had theories enough already, which have perished with the using; something more in harmony with facts, or that will better explain the facts, must now be forthcoming. II. But the Roman Wall itself, which is supposed to be the greatest barrier in the way of our accepting Ossian, has actually a literature of its own, little understood, in his favour. The three forts farthest west, and on which so much reliance has been placed as indicating the levels of the Clyde when they were built and occupied, are those at Chapel Hill, near Old Kilpatrick, at Duntocher, and at Castlehill a little farther to the east; all under the ridge of the Kilpatrick Hills, and all--one of them very closely--overlooking the Clyde. But in excavating the remains of Roman architecture in these forts, stones have been found with symbolical sculptures upon them which are still in existence, or which have been accurately copied for public use. On one of the stones at Chapel Hill, farthest west, we have the figure of a wild boar in flight; on one at Duntocher we have another wild boar, on two more there we have sea-dogs or seals and winged horses; on two more at Castlehill we have another boar, and another seal, and an osprey or sea-eagle on the back of the seal; but beyond this to the eastward, although a boar still occurs, not another seal appears. How then is all this descriptive or symbolical sculpture, so plain and so significant, to be accounted for, if the Frith of Clyde had not then been a sea flowing up into the recesses of the land, as high almost as Duntocher and Castlehill? The wild boar is traceable throughout, for he inhabited the woods on the Kilpatrick range, as far eastward, perhaps, as Simmerton; and we find him eating acorns, even beyond that. On the other