At the earliest period Europe presents us with a double population. An Indo-Germanic column had entered it from the east, and had separated into two portions the occupants it had encountered, driving one to the north, the other to the south-west. These primitive tribes betray, physiologically, a Mongolian origin; and there are indications of considerable weight that they themselves had been, in ancient times, intruders, who, issuing from their seats in Asia, had invaded and dislocated the proper autochthons of Europe. In the Pleistocene age there existed in Central Europe a rude race of hunters and fishers, closely allied to the Esquimaux. Man was contemporary with the cave bear, the cave lion, the amphibious hippopotamus, the mammoth. Caves that have been examined in France or elsewhere have furnished for the stone age, axes, knives, lance and arrow points, scrapers, hammers. The change from what has been termed the chipped, to the polished stone period, was very gradual. It coincides with the domestication of the dog, an epoch in hunting life. The appearance of arrow heads indicates the invention of the bow, and the rise of man from a defensive to an offensive mode of life. The introduction of barbed arrows shows how inventive talent was displaying itself; bone and horn tips, that the huntsman was including smaller animals, and perhaps birds, in his chase; bone whistles, his companionship with other huntsmen, or with his dog. The scraping knives of flint, indicate the use of skin for clothing, and rude bodkins and needles, its manufacture. Shells perforated for bracelets and necklaces, prove how soon a taste for personal adornment was acquired, the implements necessary for the preparation of pigments suggest the painting of the body, and perhaps, tattooing; and batons of rank bear witness to the beginning of a social organization. We have thus as our starting-point a barbarian population, believers in sorcery, and, in some places, undoubtedly cannibals, maintaining, in the central and northern parts of Europe, their existence with difficulty by reason of the severity of the climate. In the southern, more congenial conditions permitted a form of civilization to commence, of which the rude Cyclopean structures here and there met with, such as the ruins of Orchomenos, the lion gate of Mycenæ, the tunnel of Lake Copais, are perhaps the vestiges. [Sidenote: Their social condition.]