Again, while much speculation has been had in respect to the origin and use of the mounds of our Western and Southwestern States, it seems to have been overlooked that almost the exact counterparts of these mounds exist to-day in the earth-pyramid of Cholula, near Puebla, and the two pyramids at Teotihuacan, about fifty miles east of the city of Mexico; and that those structures were in use for religious rites and purposes—i. e., "mound-worship"—at the time of the invasion of the country by the Spaniards under Cortes. It seems difficult, therefore, to avoid also this further inference, that there is an intimate connection as to origin and use between all these North American mound-structures, and that they are all the work of substantially one and the same people, who found their last development and, perhaps, origin in Mexico or Central America. In calling attention to these circumstances, and in venturing opinions concerning them, the writer makes no pretension to archaeological knowledge, but he simply offers what seem to him the simple, common-sense conclusions which every observer must come to, who does not bring to his eye a capacity for seeing what has been limited by some preconceived theories.
Note.—When the views as above expressed respecting the character of the civilization of the Aztecs were originally presented in the pages of "The Popular Science Monthly," they evoked, especially from Mexican sources, not a little adverse criticism; and the author
