M. Dupont thinks the evidence very clearly points to the presence of two distinct stages in cave life—one of which he calls the Mammoth period, and the other, which is more recent, the Reindeer. It is, however, known that the mammoth lived all through the Reindeer epoch, if not to later times; so the names bestowed on these periods do not seem very appropriate. We can readily see, however, that, while the names might be wrong, the two periods might be reality. In many cases, the same cave contained remains of both stages, separated by layers of cave earth, and it is noticed that, in such cases, those of the Reindeer stage are invariably of a later date. In general terms, M. Dupont finds that the implements of the Mammoth period are of a rude make, consisting of a poor kind of flint, and poorly finished. But, in beds of the Reindeer epoch, the flint implements consist, principally, of well-shaped blades and flakes—with numerous bodkins, or awls—javelins, or arrow-heads —besides articles of bone and horn such as harpoons, and teeth of various animals drilled as if suspended for ornaments. Their workmanship indicates decidedly more skill than that of the implements obtained from the lower levels. But the most remarkable finds of the Reindeer epoch consist of portions of reindeer horn, showing etchings or engravings which have been traced by some sharp point, no doubt by a flint implement. One small bit of horn has been cut or scraped so as to present the rude outline of a human figure. So far the evidence seems to bear out the same conclusions as do those of the British caves, though it also shows that the men of the Drift inhabited caves quite extensively. We must remember, however, that the greatest wealth of cave relics belongs to the so-called Cave-men, but that savage tribes have always resorted to caves as a place for occasional habitation.10