His keen eyes looking furtively out from beneath heavy eyebrows were fixed keenly upon the Steam Man. He was dressed in a curious-looking suit of some sort of queerly-woven cloth, a compromise between the garb of a Turk and a native Mexican. In his hand he carried a long lance steel tipped. For a full minute he stood gazing at the Steam Man. ‪“Golly, Marse Frank,” muttered Pomp. ‪“Dat am de funniest-looking little man I eber seed.” “Well, you’re right, Pomp,” agreed Frank, regarding the other with interest. ‪“If he is a specimen of the aborigines of this country they were a funny looking lot of people.” But the funny looking little man leaped down from his perch and now advanced toward the Steam Man, gesticulating and talking in some strange tongue. Frank could not understand a word he said. The famous inventor opened the door of the cage and stepped down into the court-yard. At this the aborigine came to a halt not ten paces distant. He spoke to Frank in a strange tongue. Frank did not attempt to make it out, but replied: ‪“I cannot talk your language, sir.” Again the little man spoke. Frank repeated his declaration. The pigmy gesticulated furiously and swung his lance threateningly. But Frank tried to pacify him by resorting to signs. This had some little effect. The pigmy understood partly the signs Frank made. The young inventor pointed to the Steam Man and talked and gesticulated. The pigmy’s confidence seemed to be gained and he approached nearer. ‪“Now, Pomp,” said Frank, ‪“start the Man up a little.” Pomp pulled the throttle rein. The Steam Man gave a puff and began to move ahead. The effect upon the pigmy was rather startling. He dropped his lance and stood for a moment trembling in abject terror. Then wheeling, with several cat-like leaps he gained the edge of the parapet and went over it. Frank rushed to the wall and looked over. But the pigmy had gone. He was nowhere to be seen. Frank now began to fathom the mystery of the place. These strange people had methods of living vastly at variance with American ideas. None of them were visible just now. He had read of a class of people in Africa who never showed themselves above ground in daylight. All of their work was done at night, and during the daytime they burrowed caverns in the ground and slept. These people of the marble pueblo might be much the same. Frank began to believe that this was the way of it. The light which he had seen the night before was no doubt used by the workmen in laying the stone and mortar for the structure. But where did they find hiding places during the day? Were there chambers or caverns underneath the marble pueblo? Certainly the pigmy could not have disappeared so easily if there was not some method of hiding in some such manner. Frank vaulted the parapet and began to examine the stone walls. After some moments’ search to his surprise, as he touched one of the stones, it swung inward.