The Great Miocene Bridge
Again, many careful observers have noticed the striking resemblance between the natives of America and Northern Asia. At Bering Strait the Old World and the New are separated by a narrow sea-passage only, and an elevation of the sea-bed of less than two hundred feet would provide a 'land-bridge' at least thirty miles in breadth between the two continents. It is a geological fact that Bering Strait has been formed since the Tertiary period, and that such a 'land-bridge' once existed, to which American geologists have given the name of 'the Miocene bridge.' By this 'bridge,' it is believed, man crossed from Asia to America, and its subsequent disappearance confined him to the Western Hemisphere.
American Man in Glacial Times
That this migration occurred before the Glacial period is proved by the circumstance that chipped flints and other implements have been discovered in ice-drift at points in Ohio, Indiana, and Minnesota, to which it is known that the southern margin of the ice-sheet extended. This proves that man was driven southward by the advancing ice, as were several Old World animal species which had migrated to America. However, it is difficult in many cases to accept what may seem to be evidence of the presence of prehistoric man in North America with any degree of confidence, and it will be well to confine ourselves to the most authentic instances. In the loess of the Mississippi at Natchez Dr. Dickson found side by side with the remains of the mylodon and megalonyx human bones blackened by time. But Sir Charles Lyell pointed out that these remains might have been carried by the action of water from the numerous Indian places of burial in the neighbourhood. In New Orleans, while trenches were being dug for gas-pipes, a skeleton was discovered sixteen feet from the surface, the skull of which was embedded beneath a gigantic cypress-tree. But the deposit in which the remains were found was subsequently stated to be of recent origin. A reed mat was discovered at Petit Anse, Louisiana, at a depth of from fifteen to twenty feet, among a deposit of salt near the tusks or bones of an elephant. In the bottom-lands of the Bourbeuse River, in Missouri, Dr. Koch discovered the remains of a mastodon. It had sunk in the mud of the marshes, and, borne down by its own ponderous bulk, had been unable to right itself. Espied by the hunters of that dim era, it had been attacked by them, and the signs of their onset—flint arrow-heads and pieces of rock—were found mingled with its bones. Unable to dispatch it with their comparatively puny weapons, they had built great fires round it, the cinder-heaps of which remain to the height of six feet, and by this means they had presumably succeeded in suffocating it.
In Iowa and Nebraska Dr. Aughey found many evidences of the presence of early man in stone weapons mingled with the bones of the mastodon. In California, Colorado, and Wyoming scores of stone mortars, arrow-heads, and lance-points have been discovered in deposits which show no sign of displacement. Traces of ancient mining operations are also met with in California and the Lake Superior district, the skeletons of the primitive miners being found, stone hammer in hand, beneath the masses of rock which buried them in their fall. As the object of these searchers was evidently metal of some description, it may reasonably be inferred that the remains are of comparatively late date.
The Calaveras Skull
In 1866 Professor J. D. Whitney discovered the famous 'Calaveras' skull at a depth of about a hundred and thirty feet in a bed of auriferous gravel on the western slope of the Sierra Nevada, California. The skull rested on a bed of lava, and was covered by several layers of lava and volcanic deposit. Many other remains were found in similar geological positions, and this was thought to prove that the Calaveras skull was not an isolated instance of the presence of man in America in Tertiary times. The skull resembles the Eskimo type, and chemical analysis discovered the presence of organic matter. These circumstances led to the conclusion that the great age claimed by Whitney for the relic was by no means proved, and this view was strengthened by the knowledge that displacements of the deposits in which it had been discovered had frequently been caused by volcanic agency.
More Recent Finds
More recent finds have been summarized by an eminent authority connected with the United States Bureau of Ethnology as follows: "In a post-Glacial terrace on the south shore of Lake Ontario the remains of a hearth were discovered at a depth of twenty-two feet by Mr. Tomlinson in digging a well, apparently indicating early aboriginal occupancy of the St. Lawrence basin. From the Glacial or immediately post-Glacial deposits of Ohio a number of articles of human workmanship have been reported: a grooved axe from a well twenty-two feet beneath the surface, near New London; a chipped object of waster type at Newcomerstown, at a depth of sixteen feet in Glacial gravel; chipped stones in gravels, one at Madisonville at a depth of eight feet, and another at Loveland at a depth of thirty feet. At Little Falls, Minn., flood-plain, deposits of sand and gravel are found to contain many artificial objects of quartz. This flood-plain is believed by some to have been finally abandoned by the Mississippi well back toward the close of the Glacial period in the valley, but that these finds warrant definite conclusions as to time is seriously questioned by Chamberlain. In a Missouri river-beach near Lansing, Kansas, portions of a human skeleton were recently found at a depth of twenty feet, but geologists are not agreed as to the age of the formation. At Clayton, Mo., in a deposit believed to belong to the loess, at a depth of fourteen feet, a well-finished grooved axe was found. In the Basin Range region, between the Rocky Mountains and the sierras, two discoveries that seem to bear on the antiquity of human occupancy have been reported: in a silt deposit in Walker River Valley, Nevada, believed to be of Glacial age, an obsidian implement was obtained at a depth of twenty-five feet; at Nampa, Idaho, a clay image is reported to have been brought up by a sand-pump from a depth of three hundred and twenty feet in alternating beds of clay and quicksand underlying a lava flow of late Tertiary or early Glacial age. Questions are raised by a number of geologists respecting the value of these finds."
Later Man in America
Whatever doubt attaches to the presence of man in America during the Tertiary period—a doubt which is not shared by most American archæologists—there is none regarding his occupation of the entire continent in times less remote, yet far distant from the dawn of the earliest historical records of Asia or Europe. In caves and 'kitchen-middens' or rubbish-heaps over the entire length and breadth of the American continent numerous evidences of the presence of populous centres have been discovered. Mingled with the shells of molluscs and the bones of extinct animals human remains, weapons, and implements are to be found, with traces of fire, which prove that the men of those early days had risen above the merely animal existence led by the first-comers to American soil.
Affinities with Siberian Peoples
As has already been indicated, careful observers have repeatedly remarked upon the strong likeness between the American races and those of North-eastern Asia. This likeness is not only physical, but extends to custom, and to some extent to religious belief.
"The war-dances and medicine customs of the Ostiaks resemble those of the Kolusches even to the smallest details, and the myth of a heaven-climber, who ascends the sky from a lofty tree, lowering himself again to earth by a strip of leather, a rope of grass, a plait of hair, or the curling wreath of smoke from a hut, occurs not only among the Ugrian tribes, but among the Dogrib Indians. Such myths, it is contended, though insufficient to prove common descent, point to early communications between these distant stocks. Superstitious usages, on the other hand, it is argued, are scarcely likely to have been adopted in consequence of mere intercourse, and indicate a common origin. Thus, among the Itelmians of Kamchatka it is forbidden to carry a burning brand otherwise than in the fingers; it must on no account be pierced for that purpose with the point of a knife. A similar superstition is cherished by the Dakota. Again, when the tribes of Hudson Bay slay a bear they daub the head with gay colours, and sing around it hymns having a religious character; it is understood to symbolize the spirit of the deceased animal. A similar practice, it is said, prevails throughout Siberia, and is met with among the Gilyaks of the Amur, and the Ainu. The Ostiaks hang the skin of a bear on a tree, pay it the profoundest respect, and address it while imploring pardon of the spirit of the animal for having