There are other methods for determining the approximate age of the monuments of Mayab: 1st. By means of their actual orientation; starting from the _fact_ that their builders always placed either the faces or angles of the edifices fronting the cardinal points. 2d. By determining the epoch when the mastodon became extinct. For, since _Can_ or his ancestors adopted the head of that animal as symbol of deity, it is evident they must have known it; hence, must have been contemporary with it. 3d. By determining when, through some great cataclysm, the lands became separated, and all communications between the inhabitants of _Mayab_ and their colonies were consequently interrupted. If we are to credit what Psenophis and Sonchis, priests of Heliopolis and Saïs, said to Solon “that nine thousand years before, the visit to them of the Athenian legislator, in consequence of great earthquakes and inundations, the lands of the West disappeared in one day and a fatal night,” then we may be able to form an idea of the antiquity of the ruined cities of America and their builders. Reader, I have brought before you, without comments, some of the FACTS, that after ten years of research, the paintings on the walls of _Chaacmol’s_ funeral chamber, the sculptured inscriptions carved on the stones of the crumbling monuments of Yucatan, and a comparative study of the vernacular of the aborigines of that country, have revealed to us. I have no theory to offer. Many years of further patient investigations, the full interpretation of the monumental inscriptions, and, above all, the possession of the libraries of the learned men of _Mayab_, are the _sine qua non_ to form an uncontrovertible one, free from the speculations which invalidate all books published on the subject heretofore. If by reading these pages you have learned something new, your time has not been lost; nor mine in writing them. Transcriber’s Note The following typographical errors have been maintained: