The emigrants of whom we have spoken are supposed to have been nomadic, to have first built cities in the north,--that is, the present United States; it is not improbable that they were the mound-builders of Ohio and the Mississippi valleys, and that they afterward migrated southward into Mexico. These pioneers were called Toltecs, and were settled south of the Rio Grande a thousand years ago, more or less, their capital being what is known to-day as the city of Tula, forty miles northwest of the present capital of Mexico, where many antique and curious remains still interest the traveler. The names of the nine Toltec kings who ruled up to A. D. 1097 are well ascertained. It was the fourth king, if we may believe the chroniclers, who built the city of Teotihuacan, that is, "the habitation of the gods," the only visible remains of which are the two earth pyramids of the sun and the moon. Of these we shall have occasion to treat more at length in a future chapter. In speaking of the most ancient remains at Tula and elsewhere in Mexico, Wilson pronounces them to be clearly Egyptian. It is made plain by authentic writers upon the subject that this people enjoyed a large degree of civilization; the ruins of temples supposed to have been built by them in various parts of the country, especially in Yucatan, also prove this. Humboldt says that in 648 A. D. the Toltecs had a solar year more perfect than that of the Greeks and Romans. Other-writers tell us that they were a worthy people, averse to war, allied to virtue, to cleanliness, and good manners, detesting falsehood and treachery. They introduced the cultivation of maize and cotton, constructed extensive irrigating ditches, built roads, and were a progressive race. "But where is the country," asks Humboldt, "from which the Toltecs and Mexicans issued?" They were well housed, and even elegantly clothed, maintained public schools, and commemorated passing events by elaborate sculpture and by picture-writing. So complete was their system of hieroglyphics that they wrote upon religion, history, geography, and the arts. These records were nearly all destroyed by the malicious and bigoted iniquity of a Spanish priest named Zumarrage, who made it his business to seek for and burn all tokens, great and small, which related to the history of this extremely interesting people. A few of these curious records, in the form of pictorial writing, yet remain in Mexico, principally in the National Museum at the capital, and some have found their way across the ocean to adorn the shelves of European libraries. One of these documents, still extant, represents the country as having first been settled by a race who came out of a great cave and traveled over the realm on the backs of turtles, founding cities and towns wherever they went. This will show that the traditions of the aborigines are so fabulous as scarcely to deserve mention. Touching the vandal act of the Catholic priest Zumarrage, Prescott says: "We