Captain Dupaix saw, not far from Antequera, two truncated pyramids which were penetrated by two carefully constructed galleries. A gallery lined with hewn stone, bearing sculptured decorations, went through one of them. A similar gallery went partly through the other, and two branches were extended at right angles still farther, but terminating within. He mentions also the ruins of elaborately decorated edifices which had stood on elevated terraces. At one place he excavated a terraced mound, and discovered burnt brick; and he describes two ancient bridges of the Tlascalans, both built of hewn stone laid in cement, one of them being 200 feet long and 36 wide. Obelisks or pillars 42 feet high stood at the corners of these bridges. Important remains of the ancient people exist in many other places; and “thousands of other monuments unrecorded by the antiquaries invest every sierra and valley of Mexico with profound interest.” At Papantla, in the State of Vera Cruz, there is a very ancient pyramidal structure somewhat peculiar in style and character. It is known that important ruins exist in the forests of Papantla and Mesantla which have never been described. The remarkable pyramid at Papantla was examined and described by Humboldt. The only material employed in constructing it was hewn stone. The stone was prepared in immense blocks, which were laid in mortar. The pyramid was an exact square at the base, each side being 82 feet in length, and the height about 60 feet. The stones were admirably cut and polished, and the structure was remarkably symmetrical. Six stages could be discerned by Humboldt, and his account of it says, “A seventh appears to be concealed by the vegetation which covers the sides of the pyramid.” A great flight of steps leads to the level summit, by the sides of which are smaller nights. “The facing of the stones is decorated with hieroglyphics, in which serpents and crocodiles carved in relievo are visible. Each story contains a great number of square niches symmetrically distributed. In the first story there are 24 on each side, in the second 20, and in the third 16. There are 366 of these niches on the whole pyramid, and 12 in the stairs toward the east.”