No facts are adduced.
Indeed, evidence bearing on distribution is very hard to obtain in this area, since the physical type is so uniform throughout.

The best available criterion is the somewhat poor one of the distribution of the very various languages.

Some curious lines of migration are indicated by the occurrence of the same type of language in widely separated regions, the most striking example being the appearance of one linguistic stock, the so-called Athapascan, away up in the north-west by the Alaska boundary; at one or two points in south-western Oregon and north-western California, where an absolute medley of languages prevails; and again in the southern highlands along the line of Colorado and Utah to the other side of the Mexican frontier.
Does it follow from this distribution that the Apaches, at the southern end of the range, have come down from Alaska, by way of the Rockies and the Pacific slope, to their present habitat?
It might be so in this particular case; but there are also those who think that the signs in general point to a northward dispersal of tribes, who before had been driven south by a period of glaciation.

Thus the first thing to be settled is the antiquity of the American type of man.
A glance at South America must suffice.

Geographically it consists of three regions.