The northern part of this building stands on a native calcareous rock, rising above the level of the general area, within the outer walls, about eight feet. The height of the edifice appears to be about twenty-seven feet; its width twenty-four, and its length ten or twelve paces. The walls are six feet in thickness, the exterior of which within and without is constructed of large free stones, filled up in the interstice with small stones and lime. The ceiling is formed by vast blocks of stone, wrought and fitted to stretch over and cover the entire building. The breadth of each such mass of stone is about four feet, and the depth or thickness three feet. One of these stones of the roof has fallen in, and is broken; the entire southern wall of the building hath likewise tumbled, and the materials have mostly been carried away. But the people have not been able to remove the large fragments fallen from the roof, which their ancestors were enabled to bring from the quarry, and to raise entire to the summit of the edifice. Such are the vicissitudes of art, of knowledge, and of human powers and means, as well as of human happiness and fortunes! The stones that have fallen, lie sunk, with their surface lower than the base of the yet standing part of the building, and their bottom almost on a level with the area of the great inclosure. The appearance of these fallen stones of the southern wall, leads to a conjecture, that this extremity of the original edifice had its floor or base _lower than that of the northern part_. The entrances to this building are three, the principal one to the north, and the others to the east and west. The inside walls (beginning at half their height from the ground) are decorated with hieroglyphics sculptured in relief, but the figures seem not to have been sufficiently engraved in _alt_, or _salient_, to resist the ravages of time and weather; and in some places they are wholly mouldered and defaced, and especially on the ceiling. On different parts of the wall appear marks of paint, and the colour seems to have been green. I could no where discover traces of the edifice having in any part been lined or inlaid with a finer stone or material. A few paces from the chief entrance, I observed two round stones, of about three feet diameter, each indented, as if to receive the base of some statue or other ornament. The general material of which the building is constructed, is a lime-stone, containing petrifactions of shells and small marine animals; and such stone is to be found and dug up in the vicinity.