Northeast from the mound on which the great wall stands, and about one hundred and fifty yards distant, is a large building, erected on a terrace, and hidden among the trees growing thereupon, with its front much ruined, and having but few remains of sculptured ornaments. Still farther in the same direction, going through the woods, we reach the grand, and, without extravagance, the really magnificent building represented in the frontispiece to this volume. It stands on a gigantic terrace, four hundred feet long and one hundred and fifty feet deep. The whole terrace is covered with buildings. The front represented measures two hundred and eighty-two feet in length. It consisted of three distinct parts, differing in style, and perhaps erected at different times. At a distance, as seen indistinctly through the trees, we had no idea of its extent. We came upon it at the corner which appears on the right in the engraving. Our guide cut a path along the front wall, and stopping, as we did, to look at the ornaments, and entering the apartments as we went along, the building seemed immense.

The whole long façade was ornamented with sculptured stone, of which, large as the engraving is, the details cannot appear; but, to give some idea of their character, a detached portion is represented up the engraving opposite, and, I ought at the same time to remark, is perhaps the most curious and interesting of any. It is at the left end of the principal building, and in the angle of the corner are the huge open jaws of an alligator, or some other hideous animal, enclosing a human head.

The reader will form some idea of the overgrown and shrouded condition of this building from the fact that I had been at work nearly the whole day upon the terrace, without knowing that there was another building on the top. In order to take in the whole front at one view, it was necessary to carry the clearing back some distance into the plain, and in doing this I discovered the upper structure. The growth of trees before it was almost equal to that on the terrace, or in any part of the forest. The whole had to be cleared, the trees thrown down upon the terrace, and thence dragged away to the plain. This building consists of single narrow corridors, and the façade is of plain stone, without any ornaments.

The platform in front is the roof of the building underneath, and in this platform was a circular hole, like those we had seen at Uxmal and other places, leading to subterraneous chambers. This hole was well known to the Indians, and had a marvellous reputation; and yet they never mentioned it until I climbed up to examine the upper building. They said it was the abode of el dueño de la casa, or the owner of the building. I immediately proposed to descend, but the old Indian begged me not to do so, and said apprehensively to the others, "Who knows but that he will meet with the owner!" I immediately sent for rope, lantern, and matches; and, absurd as it may seem, as I looked upon the wild figures of the Indians standing round the hole, and their earnest faces, it was really exciting to hear them talk of the owner. As there was a difficulty in procuring rope, I had a sapling cut and let down the hole, by means of which I descended with a lantern. The news of my intention and of the preparations going on had spread among the Indians, and all left off work and hurried to the spot. The hole was about four feet deep, and, just as my head sunk below the surface, I was startled by an extraordinary scratching and scampering, and a huge iguana ran along the wall, and escaped through the orifice by which I had entered.

The chamber was entirely different in shape from those I had seen before. The latter were circular, and had dome-shaped ceilings. This had parallel walls and the triangular-arched ceiling; in fact, it was in shape exactly like the apartments above ground. It was eleven feet long, seven wide, and ten high to the centre of the arch. The walls and ceiling were plastered, and the floor was of cement, all hard and in a good state of preservation. A centipede was the only tenant after the evasion of the iguana.

While I was making these measurements, the Indians kept up a low conversation around the hole. A mystery hung around it, transmitted to them by their fathers, and connected with an indefinable sense of apprehension. This mystery might have been solved at any time in five minutes, but none of them had ever thought of doing it, and the old man begged me to come out, saying that if I died they would have to answer for it. Their simplicity and credulity seem hardly credible. They had all sense enough to take their hands out of the fire without being told, but probably to this day they believe that in that hole is the owner of the building. When I came out they looked at me with admiration. They told me that there were other places of the same kind, but they would not show them to me, lest some accident should happen; and as my attempt drew them all from work, and I could not promise myself any satisfactory result, I refrained from insisting.

This chamber was formed in the roof of the lower building. That building contained two corridors, and we had always supposed that the great interval between the arches of the parallel corridors was a solid mass of masonry. The discovery of this chamber brought to light a new feature in the construction of these buildings. Whether the other roofs, or any of them, contained chambers, it is impossible to say. Not suspecting anything of the kind, we had made no search for them, and they may exist, but with the holes covered up and hidden by the growth and decay of vegetation. Heretofore I had inclined to the opinion that the subterraneous chambers I had met with were intended for cisterns or reservoirs of water. The position of this in the roof of a building seemed adverse to such an idea, as, in case of a breach, the water might find its way into the apartment below.

At the foot of the terrace was a tree, hiding part of the building. Though holding trees in some degree of reverence, around these ruined cities it was a great satisfaction to hear them fall. This one was a noble ramon, which I had ordered to be cut down, and being engaged in another direction, I returned, and found that the Indians had not done so, and they said it was so hard that it would break their axes. These little axes seemed hardly capable of making any impression upon the trunk, and I gave them directions, perhaps still more barbarous to cut away the branches and leave the trunk. They hesitated, and one of them said, in a deprecating tone, that this tree served as food for horses and cattle, and their mistress had always charged them not to cut down such. The poor fellow seemed perplexed between the standing orders of the rancho and the special instructions to do what I required.

The ramon tree was growing out of the mouth of a cave, which the Indians said was an ancient well. I should perhaps not have observed it, but for the discussion about cutting down the tree. I had no great disposition for another subterraneous scramble, but descended the cavity or opening for the purpose of taking a bird's-eye view of the mouth. On one side was a great ledge of stone projecting as a roof, and under this was a passage in the rock, choked up by masses of fallen stone. It was impossible to continue if I had been so disposed, but there was every reason to believe that formerly there had been some wild passage through the rocks as at Xcoch and Chack, which led to a subterraneous deposite of water, and that this had been one of the sources from which the ancient inhabitants procured their supply.