As he came nearer Tarzan saw that the waste material from these building operations had been utilized in the construction of outer walls about each building or group of buildings resulting from a single hillock, and later he was to learn that it had also been used for the filling of inequalities between the hills and the forming of paved streets throughout the city, the result, possibly, more of the adoption of an easy method of disposing of the quantities of broken limestone than by any real necessity for pavements. There were people moving about within the city and upon the narrow ledges and terraces that broke the lines of the buildings and which seemed to be a peculiarity of Ho-don architecture, a concession, no doubt, to some inherent instinct that might be traced back to their early cliff-dwelling progenitors. Tarzan was not surprised that at a short distance he aroused no suspicion or curiosity in the minds of those who saw him, since, until closer scrutiny was possible, there was little to distinguish him from a native either in his general conformation or his color. He had, of course, formulated a plan of action and, having decided, he did not hesitate in the carrying out his plan. With the same assurance that you might venture upon the main street of a neighboring city Tarzan strode into the Ho-don city of A-lur. The first person to detect his spuriousness was a little child playing in the arched gateway of one of the walled buildings. "No tail! no tail!" it shouted, throwing a stone at him, and then it suddenly grew dumb and its eyes wide as it sensed that this creature was something other than a mere Ho-don warrior who had lost his tail. With a gasp the child turned and fled screaming into the courtyard of its home. Tarzan continued on his way, fully realizing that the moment was imminent when the fate of his plan would be decided. Nor had he long to wait since at the next turning of the winding street he came face to face with a Ho-don warrior. He saw the sudden surprise in the latter's eyes, followed instantly by one of suspicion, but before the fellow could speak Tarzan addressed him. "I am a stranger from another land," he said; "I would speak with Ko-tan, your king." The fellow stepped back, laying his hand upon his knife. "There are no strangers that come to the gates of A-lur," he said, "other than as enemies or slaves." "I come neither as a slave nor an enemy," replied Tarzan. "I come directly from Jad-ben-Otho. Look!" and he held out his hands that the Ho-don might see how greatly they differed from his own, and then wheeled about that the other might see that he was tailless, for it was upon this fact that his plan had been based, due to his recollection of the quarrel between Ta-den and Om-at, in which the Waz-don had claimed that Jad-ben-Otho had a long tail while the Ho-don had been equally willing to fight for his faith in the taillessness of his god.