Bancroft has prominently advocated, that the migrations of the Nahuas were from the south northward,[794] and that this was the period of the divergence, eighteen centuries ago or more, of the great civilizing stocks of Mexico and of Central America.[795] We fail to find so early a contact of these two races, if, on the other hand, we accept the old theory that the migrations which established the Toltec and Aztec powers were from the north southward,[796] through three several lines, as is sometimes held, one on each side of the Rocky Mountains, with a third following the coast. In this way such advocates trace the course of the Olmecs, who encountered the giants, and later of the Toltecs. That the Votanic peoples or some other ancient tribes were then a distinct source of civilization, and that Palenqué may even be Xibalba, or the Nachan, which Votan founded, is a belief that some archæologists find the evidence of in certain radical differences in the Maya tongues and in the Maya ruins.[797] In the Quiché traditions, as preserved in the _Popul Vuh_, and in the _Annals of the Cakchiquels_, we likewise go back into mistiness and into the inevitable myths which give the modern comparative mythologists so much comfort and enlightenment; but Bancroft[798] and the rest get from all this nebulousness, as was gotten from the Maya traditions, that there was a great power at Xibalba,[799]—if in Central America anywhere that place may have been,—which was overcome[800] when from Tulan[801] went out migrating chiefs, who founded the Quiché-Cakchiquel peoples of Guatemala, while others, the Yaqui,—very likely only traders,—went to Mexico, and still others went to Yucatan, thus accounting for the subsequent great centres of aboriginal power—if we accept this view. As respects the traditions of the more northern races, there is the same choice of belief and alternative demonstration. The Olmecs, the earliest Nahua corners, are sometimes spoken of as sailing from Florida and landing on the coast at what is now Pánuco, whence they travelled to Guatemala,[802] and finally settled in Tamoanchan, and offered their sacrifices farther north at Teotihuacan.[803] This is very likely the Votan legend suited to the more northern region, and if so, it serves to show, unless we discard the whole theory, how the Votanic people had scattered. The other principal source of our suppositions—for we can hardly call it knowledge—of these times is the _Codex Chimalpòpoca_, of which there is elsewhere an account,[804] and from it we can derive much the same impressions, if we are disposed to sustain a preconceived notion.