Suddenly the street stopped at a narrow, winding stairway that led almost straight up. All about were crowded houses of clay, dirty and weather-beaten and suggesting that only the very poorest of Arabs lived there. Having made sure that the others were following him, the stranger led the way up the stairs. At the head was a small door, and this was opened for them to go inside. But they hesitated. "Ask him what he wants," directed Bob. "There could be anything in there." Dr. Kirshner turned to the Arab and in a stern voice put the question before him. The latter surveyed the American closely, then said in the native tongue: "I wish nothing of _you_. It is Fekmah who is wanted. But if you and your friend must intrude, you may come in." The man's attitude did not win the friendship of the explorers, but chiefly because they were at a loss to know what to do next they followed him inside. A moment later the door was closed and they found themselves in a sort of twilight. As soon as their eyes became accustomed to the dim light, they made out four figures sitting in the corner of the room. The bare floor alone served the place of chairs, and the men seemed comfortable. Bob at once formed the conclusion that these Arabs were of the same type as the stranger who escorted them here, and felt a bit uneasy. He would have felt much better with a hand on his gun, but this would have aroused the suspicions of the natives. Nevertheless he kept on guard for any treachery. If it came to a fight, he knew that it would be two to five, for Fekmah was, in his age, not capable of taking part. None of the Arabs was able to speak English, evidently, but Dr. Kirshner knew the native language from his previous visits to North Africa. And he promised to translate occasionally to Bob. But a moment later it was plain that there was little translating to be done, for one of the Arabs said something to Fekmah and motioned for him to come into the next room. The Americans were to remain where they were. "I don't like this," muttered Dr. Kirshner, as he and Bob were told to be seated on the floor. "Anything may happen to him in there." "Suppose we go with him," suggested Bob. The archæologist nodded. He arose from his chair and started to follow, but one of the Arabs gently pushed him back. "It is Fekmah who is wanted," the fellow said in a queer bass voice. "You will wait here. It will only be a moment." Dr. Kirshner had half a notion to push through and follow his Arab friend, but he changed his mind and sat down with Bob on the floor. "What's the big idea of all this?" the youth asked in a puzzled voice. "They trying to double-cross us or something?" The archæologist did not answer, for he felt all too sure that something serious was wrong. But what was there to do?