It was a gloomy place. It would have been dark but for a heap of blazing wood upon a rock at one side. That is, it looked like a rock at first sight, but upon a closer inspection it proved to be a cube of well-fitted, although roughly finished, masonry. It was about six feet square, and there were three stone steps leading up in front. Behind this altar-like structure a vast wall of the natural rock, a dark limestone, had been sculptured into the shape of a colossal and exceedingly ugly human face,—as if the head of a stone giant were half sunken in that side of what was evidently an immense cave. There were men in the cave, but no women were to be seen. Several of the men were standing near the altar, and one of them was putting fuel upon the fire. The only garment worn by any of them was a ragged blanket, the Mexican serape. In the middle of the blanket was a hole, and when the wearer's head was thrust through this he was in full dress.