On the left of this mound is a staircase leading down to the area of Casa No. 2, and on the right is a grand and majestic pile of buildings, having no name assigned to it, and which, perhaps, when entire, was the most imposing structure at Kabah. It measured at the base one hundred and forty-seven feet on one side and one hundred and six on the other, and consisted of three distinct stories or ranges, one on the roof of the other, the second smaller than the first, and the third smaller than the second, having on each side a broad platform in front. Along the base on all four of the sides was a continuous range of apartments, with the doorways supported by pillars, and on the side fronting the rear of Casa No. 1 was another new and interesting feature. This was a gigantic stone staircase, rising to the roof, on which stood the second range of apartments. This staircase was not a solid mass, resting against the wall of the mound, but was supported by the half of a triangular arch springing from the ground, and resting against the wall so as to leave a passage under the staircase. This staircase was interesting not only for its own grandeur and the novelty of its construction, but as explaining what had before been unintelligible in regard to the principal staircase in the House of the Dwarf at Uxmal. The steps of this staircase are nearly all fallen, and the ascent is as on an inclined plane. The buildings on the top are ruined, and many of the doorways so encumbered that there was barely room to crawl into them. On one occasion, while clearing around this so as to make a plan, rain came on, and I was obliged to crawl into one with all the Indians, and remain in the dark, breathing a damp and unwholesome atmosphere, pent up and almost stifled, for more than an hour. The doorways of the ranges on the north side of this mound opened upon the area of Casa No 2. The platform of this area is one hundred and seventy feet long, one hundred and ten broad, and is elevated ten feet from the ground. It had been planted with corn, and required little clearing. The plate opposite presents the front of this building, and the picote, or great stone found thrown down in all the courtyards and areas, is exhibited on one side in the engraving. The edifice stands upon an upper terrace; forming a breastwork for which, and running the whole length, one hundred and sixty-four feet, is a range of apartments, with their doors opening upon the area. The front wall and the roof of this range have nearly all fallen. A ruined staircase rises from the centre of the platform to the roof of this range, which forms the platform in front of the principal building.