The whole of this building is in a good state of preservation. The interior consists of a single apartment, once covered with plaster, and along the top of the wall under the arch are seen the traces of a line of medallions or cartouches in plaster, which once contained hieroglyphics. The Indians have no superstitious feelings about these ruins, except in regard to this building; and in this they say that on Good Friday of every year music is heard sounding; but this illusion, brought with us from Santa Cruz del Quiche, was here destined to be broken. In this chamber we opened our Daguerreotype apparatus, and on Good Friday were at work all day, but heard no music. This chamber, by-the-way, was the best we had found for our Daguerreotype operations. Having but one door, it was easily darkened; we were not obliged to pack up and carry away; the only danger was of cattle getting in and breaking; and there was no difficulty in getting an Indian to pass the night in the room and guard against this peril. South of the end of the Monjas, and twenty-two feet distant, is another building, measuring thirty eight feet by thirteen, having the exterior above the cornice decorated in the usual manner, but which I do not think it worth while to present. [Engraving 42: The Caracol, a Circular Edifice] Leaving this pile of buildings, and passing on northward from the Monjas, at the distance of four hundred feet we reach the edifice represented in the opposite engraving, conspicuous among the ruins of Chichen for its picturesque appearance, and unlike any other we had seen, except one at Mayapan much ruined. It is circular in form, and is known by the name of the Caracol, or winding staircase, on account of its interior arrangements. It stands on the upper of two terraces. The lower one measures in front from north to south two hundred and twenty-three feet, and in depth from east to west one hundred and fifty feet, and is still in good preservation. A grand staircase forty-five feet wide, and containing twenty steps, rises to the platform of this terrace. On each side of this staircase, forming a sort of balustrade, were the entwined bodies of two gigantic serpents, three feet wide, portions of which are still in place; and among the ruins of the staircase we saw a gigantic head, which had terminated at one side the foot of the steps.