THE RETURN OF TARZAN
The deep deposit of dust which he had noticed upon the blocks as he had first removed them from the wall had convinced him that even if the present occupants of the ancient pile had knowledge of this hidden passage they had made no use of it for perhaps generations.
The wall replaced, Tarzan turned to the shaft, which was some fifteen feet wide at this point. To leap across the intervening space was a small matter to the ape-man, and a moment later he was proceeding along a narrow tunnel, moving cautiously for fear of being precipitated into another shaft such as he had just crossed.
He had advanced some hundred feet when he came to a flight of steps leading downward into Stygian gloom. Some twenty feet below, the level floor of the tunnel recommenced, and shortly afterward his progress was stopped by a heavy wooden door which was secured by massive wooden bars upon the side of Tarzan's approach. This fact suggested to the ape-man that he might surely be in a passageway leading to the outer world, for the bolts, barring progress from the opposite side, tended to substantiate this hypothesis, unless it were merely a prison to which it led.
Along the tops of the bars were deep layers of dust—a further indication that the passage had lain long unused. As he pushed the massive obstacle aside, its great hinges shrieked out in weird protest against this unaccustomed disturbance. For a moment Tar-
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