Hearing no noise and seeing no evidence of another than himself, Tarzan opened the door and stepped into the hallway. His nostrils were now assailed strongly by the same heavy fragrance of incense that had first greeted him upon his approach to the palace several days before. In the interior of the tower, however, it was much more powerful, practically obliterating all other odors, and placing upon the ape-man an almost prohibitive handicap in his search for La. In fact as he viewed the doors upon this single stage of the tower, he was filled with consternation at the prospect of the well-nigh impossible task that confronted him. To search this great tower alone, without any assistance whatever from his keen sense of scent, seemed impossible of accomplishment, if he were to take even the most ordinary precautions against detection. The ape-man’s self-confidence was in no measure blundering egotism. Knowing his limitations, he knew that he would have little or no chance against even a few Bolgani were he to be discovered within their palace, where all was familiar to them and strange to him. Behind him was the open window, and the silent jungle night, and freedom. Ahead danger, predestined failure; and, quite likely, death. Which should he choose? For a moment he stood in silent thought, and then, raising his head and squaring his great shoulders, he shook his black locks defiantly and stepped boldly toward the nearest door. Room after room he had investigated until he had made the entire circle of the landing, but in so far as La or any clew to her were concerned his search was fruitless. He found quaint furniture and rugs and tapestries, and ornaments of gold and diamonds, and in one dimly lighted chamber he came upon a sleeping Bolgani, but so silent were the movements of the ape-man that the sleeper slept on undisturbed, even though Tarzan passed entirely around his bed, which was set in the center of the chamber, and investigated a curtained alcove beyond. Having completed the rounds of this floor, Tarzan determined to work upward first and then, returning, investigate the lower stages later. Pursuant to this plan, therefore, he ascended the strange stairway. Three landings he passed before he reached the upper floor of the tower. Circling each floor was a ring of doors, all of which were closed, while dimly lighting each landing were feebly burning cressets—shallow, golden bowls—containing what appeared to be tallow, in which floated a tow-like wick. Upon the upper landing there were but three doors, all of which were closed. The ceiling of this hallway was the dome-like roof of the tower, in the center of which was another circular opening, through which the stairway protruded into the darkness of the night above.