We set off again au grand galop, drivers and outriders giving, from time to time, the most extraordinary shrieks to encourage the horses and to amuse themselves, wild and shrill enough to frighten any civilized quadruped. The road grew more picturesque as we advanced, and at length our attention was arrested by the sight of the two great pyramids, which rise to the east of the town of San Juan Teotihuacan, which are mentioned by Humboldt, and have excited the curiosity and attention of every succeeding traveller. These huge masses were consecrated to the sun and moon, which, in the time of Cortes, were there represented by two vast stone idols, covered with gold. The conquerors made use of the gold, and broke the idols in pieces, by order of the first bishop of Mexico. Unfortunately, our time was too limited to give them more than a passing observation. Fragments of obsidian, in the form of knives and of arrows, with which the priests opened the breasts of their human victims, are still to be found there; and numerous small idols made of baked clay, are to be seen both there and in the plains adjoining. The Indians rather dislike to guide travellers to these pyramids, and their reluctance to do so has increased the popular belief of the existence of great concealed treasures near or in them.
The whole plain on which these great pyramids stand, was formerly called Micoatl, or the Pathway of the Dead; and the hundreds of smaller pyramids which surround the larger ones, (the Temples of the Sun and Moon,) are symetrically disposed in wide streets, forming a great burial-plain, composed per-
