Cranial Deformation.
The "Toltecs."
The Athapascans alone are homogeneous, and their sub-brachycephaly recurs amongst the Apaches and their other southern kindred, who have given it an exaggerated form by the widespread practice of artificial deformation, which dates from remote times. The most typical cases both of brachy and dolicho deformation are from the Cerro de las Palmas graves in south-west Mexico. Deformation prevails also in Peru and Bolivia, as well as in Ceara and the Rio Negro on the Atlantic side. The flat-head form, so common from the Columbia estuary to Peru, occurs amongst the broad-faced Huaxtecs, their near relations the Maya-Quichés, and the Nahuatlans. It is also found amongst the extinct Cebunys of Cuba, Hayti and Jamaica, and the so-called "Toltecs," that is, the people of Tollan (Tula), who first founded a civilised state on the Mexican table-land (sixth and seventh centuries A.D.), and whose name afterwards became associated with every ancient monument throughout Central America. On this "Toltec question" the most contradictory theories are current; some hold that the Toltecs were a great and powerful nation, who after the overthrow of their empire migrated southwards, spreading their culture throughout Central America; others regard them as "fabulous," or at all events "nothing more than a sept of the Nahuas themselves, the ancestors of those Mexicans who built Tenochtitlan," i.e. the present city of Mexico. A third view, that of Valentini, that the Toltecs were not Nahuas but Mayas, is now supported both by E. P. Dieseldorff[753] and by Förstemann[754]. T. A. Joyce[755] suggests that the vanguard of the Nahuas on reaching the Mexican valley adopted and improved the culture of an agricultural people of Tarascan affinities whose culture was in part due to Mayan inspiration, whom they found settled there. Later migrations of Nahua were greatly impressed with the "Toltec" culture which had thus arisen through the impact of a virile hunting people on more passive agriculturalists.
Type of North-west Coast Indians Variable.
On the North-west Pacific Coast similar ethnical interminglings recur, and Franz Boas[756] here distinguishes as many as four types, the Northern (Tsimshian and others), the Kwakiutl, the Lillooet of the Harrison Lake region and the inland Salishan (Flat-heads, Shuswaps, etc.). All are brachycephalic, but while the Tsimshians are of medium height 1.675 m. (5 ft. 6 in.) with low, concave nose, very large head, and enormously broad face, exceeding the average for North America by 6 mm., the Kwakiutls are shorter 1.645 m. (5 ft. 4¾ in.) with very high and relatively narrow hooked nose, and quite exceptionally high face; the Harrison Lake very short 1.600 m. (5 ft 3 in.) with exceedingly short and broad head (C. I. nearly 89), "surpassing in this respect all other forms known to exist in North America"; lastly, the inland Salish of medium height 1.679 m. (5 ft. 6 in.) with high and wide nose of the characteristic Indian form and a short head.
Date of Migrations.
It would be difficult to find anywhere a greater contrast than that which is presented by some of these British Columbian natives, those, for instance, of Harrison Lake with almost circular heads (88.8), and some of the Labrador Eskimo with a degree of dolichocephaly not exceeded even by the Fijian Kai-Colos (65)[757]. But this violent contrast is somewhat toned by the intermediate forms, such as those of the Tlingits, the Aleutian islanders, and the western (Alaskan) Eskimo, by which the transition is effected between the Arctic and the more southern populations. It is not possible at present to indicate even in outline the chronology of any of the ethnic movements outlined above. Warren K. Moorehead[758] agrees with the great majority of American archaeologists in holding the existence of palaeolithic man in North America as not proven[759], the so-called palaeoliths being either rejects or rude tools for rough purposes. When man migrated to America from North and East Asia whenever that period may have been, he appears to have been in that stage of culture—or rather of stone technique—which we term Neolithic, and the drifting movement ceased before he had learnt the use of metals.
Evidence from Linguistics.
A further proof of the antiquity of the migrations is afforded by linguistics. A. F. Chamberlain asserts[760] that "it may be said with certainty, so far as all data hitherto presented are concerned, that no satisfactory proof whatever has been put forward to induce us to believe that any single American Indian tongue or group of tongues has been derived from any Old World form of speech now existing or known to have existed in the past. In whatever way the multiplicity of American Indian languages and dialects may have arisen, one can be reasonably sure that the differentiation and divergence have developed here in America and are in no sense due to the occasional intrusion of Old World tongues individually or en masse.... Certain real relationships between the American Indians and the peoples of north-eastern Asia, known as 'Paleo-Asiatics,' have, however, been revealed as a result of the extensive investigations of the Jesup North Pacific Expedition.... The general conclusion to be drawn from the evidence is that the so-called 'Paleo-Asiatic' peoples of north-eastern Asia, i.e. the Chukchee, Koryak, Kamchadale, Gilyak, Yukaghir, etc. really belong physically and culturally with the aborigines of north-western America.... Like the modern Asiatic Eskimo they represent a reflex from America and Asia, and not vice versa.... It is the opinion of good authorities also that the 'Paleo-Asiatic' peoples belong linguistically with the American Indians rather than with the other tribes and stocks of northern or southern Asia. Here we have then the only real relationship of a linguistic character that has ever been convincingly argued between tongues of the New World and tongues of the Old."
It is not merely that the American languages differ from other forms of speech in their general phonetic, structural and lexical features; they differ from them in their very morphology, as much, for instance, as in the zoological world class differs from class, order from order. They have all of them developed on the same polysynthetic lines, from which if a few here and there now appear to depart, it is only because in the course of their further evolution they have, so to say, broken away from that prototype[761]. Take the rudest or the most highly cultivated anywhere from Alaska to Fuegia—Eskimauan, Iroquoian, Algonquian, Aztec, Tarascan, Ipurina, Peruvian, Yahgan—and you will find each and all giving abundant evidence of this universal polysynthetic character, not one true instance of which can be found anywhere in the eastern hemisphere. There is incorporation with the verb, as in Basque, many of the Caucasus tongues, and the Ural-Altaic group; but it is everywhere limited to pronominal and purely relational elements.