We have no measure of the time, no clew to the old dates, nothing whatever, beyond such considerations as I have stated, to warrant even a vague hypothesis. It can be seen clearly that the beginning of this old civilization was much older than the earliest great cities, and, also, that these were much more ancient than the time when any of the later built or reconstructed cities whose relics still exist, were left to decay. If we suppose Palenque to have been deserted some six hundred years previous to the Spanish Conquest, this date will carry us back only to the last days of its history as an inhabited city. Beyond it, in the distant past, is a vast period, in which the civilization represented by Palenque was developed, made capable of building such cities, and then carried on through the many ages during which cities became numerous, flourished, grew old, and gave place to others, until the long history of Palenque itself began. Those who have sought to discredit what is told of the Aztec civilization and the empire of Montezuma have never failed to admit fully the significance of Copan, Palenque, and Mitla. One or two writers, pursuing the assumption that the barbarous tribes at the north and the old Mexicans were of the same race, and substantially the same people, have undertaken to give us the history of Montezuma’s empire “entirely rewritten,” and show that his people were “Mexican savages.” In their hands Montezuma is transformed into a barbarous Indian chief, and the city of Mexico becomes a rude Indian village, situated among the islands and lagoons of an everglade which afforded unusual facilities “for fishing and snaring birds.” One goes so far as to maintain this with considerable vehemence and amusing unconsciousness of absurdity. He is sure that Montezuma was nothing more than the principal chief of a parcel of wild Indian tribes, and that the Pueblos are wild Indians changed to their present condition by Spanish influence. There is something in this akin to lunacy. But this topic will receive more attention in another place. I bring it to view here because those who maintain so strangely that the Aztecs were Indian savages, admit all that is claimed for the wonderful ruins at the south, and give them a very great antiquity. They maintain, however, that the civilization represented by these ruins was brought to this continent in remote pre-historic times by the people known as Phœnicians, and their method of finding the Phœnicians at Palenque, Copan, and every where else, is similar in character and value to that by which they transform the Aztec empire into a rude confederacy of wild Indians. DISTINCT ERAS TRACED.