many places are quite perfect. It is flat topped, has four sides, and measures at the base thirty-eight by thirty-five feet, while in height it is nineteen. Immediately behind this, and on all that portion of the hill that presents itself to the square, are numerous tiers of seats either broken in the rock or built of rough stones. In the centre of the square, and due south of the pyramid, is a small quadrangular building, seven feet by five in height. The summit is imperfect, but has unquestionably been an altar; and from the whole character of the space in which it stands, the peculiar form of the pyramid, the surrounding terrace, and the seats or steps on the mountain, there can be little doubt that this has been the grand Hall of Sacrifice or Assembly, or perhaps both.
"Passing to the westward, we next saw some narrow enclosed spaces, apparently portions of an aqueduct leading from some tanks on the summit of the mountain, and then we were shown to the mouth of the cave, or subterraneous passage, of which so many suspicious stories are yet told and believed. One of the principal objects of our expedition had been to enter this place, which none of the natives had ever ventured to do, and we came provided with torches accordingly: unfortunately however, the mouth had very recently fallen in, and we could merely see that it was a narrow, well built entrance, bearing in many places the remains of good smooth plastering. A large beam of cedar once supported the roof, but its removal by the country people had caused the dilapidation which we now observed. Mr. Sindal, in knocking out some pieces of regularly burnt brick, soon brought a ruin upon his head, but escaped without injury; and this accident caused a thick cloud of yellow dust to fall, which, on issuing from the cave, assumed a bright appearance under the full glare of the sun;—an effect not lost on the natives, who became more than ever persuaded that an immense treasure lay hidden in that mysterious place. The general opinion of those who remember the excavation is that it is very deep; and from many circumstances there is a probability of its having been a place of confinement for victims. Its vicinity to the great hall, in which there can