The cranial forms of the American aborigines have by some been supposed to present anomalies distinguishing their race from all others, and even its chief families from one another. This, too, falls to the ground before a rigid analysis. The last word of craniology, which at one time promised to revolutionize ethnology and even history, is that no one form of the skull is peculiar to the natives of the New World; that in the same linguistic family one glides into another by imperceptible degrees; and that there is as much diversity, and the same diversity among them in this respect as among the races of the Old Continent.[35-2] Peculiarities of structure, though they may pass as general truths, offer no firm foundation whereon to construct a scientific ethnology. Anatomy shows nothing unique in the Indian, nothing demanding for its development any special antiquity, still less an original diversity of type. On the other hand, the remains of primeval art and the impress he made upon nature bespeak for man a residence in the New World coeval with the most distant events of history. By remains of art I do not so much refer to those desolate palaces which crumble forgotten in the gloom of tropical woods, nor even the enormous earthworks of the Mississippi valley covered with the mould of generations of forest trees, but rather to the humbler and less deceptive relics of his kitchens and his hunts. On the Atlantic coast one often sees the refuse of Indian villages, where generation after generation have passed their summers in fishing, and left the bones, shells, and charcoal as their only epitaph. How many such summers would it require for one or two hundred people to thus gradually accumulate a mound of offal eight or ten feet high and a hundred yards across, as is common enough? How many generations to heap up that at the mouth of the Altamaha River, examined and pronounced exclusively of this origin by Sir Charles Lyell,[36-1] which is about this height, and covers ten acres of ground? Those who, like myself, have tramped over many a ploughed field in search of arrow-heads must have sometimes been amazed at the numbers which are sown over the face of our country, betokening a most prolonged possession of the soil by their makers. For a hunting population is always sparse, and the collector finds only those arrow-heads which lie upon the surface.