To associate, then, these Mound Builders with the early wandering tribes who descended to the plateau of Anahuac, is no help, at present, to the student of Mexican antiquity. Yet the idea is pleasing to the imagination; and it is even reason to hope that future discoveries in either region may throw light upon the early stay of the other. Had we sure knowledge that the Mound Builders and the Nahuas were of the same race, we should still have to inquire whence came they all before they settled in the Mississippi valley, were driven out by their enemies, and migrated to the Mexican plateau? Such speculations are the pastime of the student of lost races. For him to dream of the possible homes of a set of people where traces are but faintly to be discerned, is as fascinating as building airy castles in Spain. The theory of a submerged continent beneath the Azores, opposite the mouth of the Mediterranean, which might be the island described by Plato, Atlantis, the region where man first emerged from a condition like that of beasts to a constantly advancing state of civilization, plays a part in the fancies of those who are wondering about the origin of the Nahuatl tribes of Anahuac. The distant home of which they all preserved the legend under one name or another, one of which was Aztlan, the musical title given it by the Mexicans, was, perhaps, Atlantis, the broad and mighty realm where mankind in its childhood lived for generations in tranquillity and happiness. Huehue-Tlapallan, Aztlan, Atlantis, these names represent the universal tradition of this early home. The world before the Deluge, the Garden of Eden, the Garden of the Hesperides, the Elysian Fields, Olympus, Asgard,--all these are but different terms to express the vague vision in men's minds of a happy past. If the theory of Atlantis could be true, these were not mere visions but traditions preserving a consistent recollection of real historical events, of a populous and mighty cradle of nations which peopled the shores of the Gulf of Mexico, the Mississippi, the Amazon, and the Pacific coasts of South America, as well as the older world.