Little Manu was very much afraid out there alone in the growing dusk, and he scampered very fast with his tail bowed up and out behind him. All the time he cast affrighted glances to the right and left. The moment he reached the kopje he scampered up its face as fast as he could. It was really a huge, precipitous granite rock with almost perpendicular sides, but sufficiently weather-worn to make its ascent easy to little Manu. He paused a moment at the summit to get his breath and still the beatings of his frightened little heart, and then he made his way around to a point where he could look down upon the party beneath. There, indeed, was the great Tarmangani Tarzan, and with him were some fifty Gomangani. The latter were splicing together a number of long, straight poles, which they had laid upon the ground in two parallel lines. Across these two, at intervals of a foot or more, they were lashing smaller straight branches about eighteen inches in length, the whole forming a crude but substantial ladder. The purpose of all this Manu, of course, did not understand, nor did he know that it had been evolved from the fertile brain of Flora Hawkes as a means of scaling the precipitous kopje, at the summit of which lay the outer entrance to the treasure vaults of Opar. Nor did Manu know that the party had no intention of entering the city of Opar and were therefore in no danger of becoming victims of Cadj’s hidden assassins. To him, the danger to Tarzan of the Apes was very real, and so, having regained his breath, he lost no time in delivering his warning to the friend of his people. “Tarzan,” he cried, in the language that was common to both. The white man and the blacks looked up at the sound of his chattering voice. “It is Manu, Tarzan,” continued the little monkey, “who has come to tell you not to go to Opar. Cadj and his people await within the outer wall to slay you.” The blacks, having discovered that the author of the disturbance was nothing but a little gray monkey, returned immediately to their work, while the white man similarly ignored his words of warning. Manu was not surprised at the lack of interest displayed by the blacks, for he knew that they did not understand his language, but he could not comprehend why Tarzan failed to pay any attention whatsoever to him. Again and again he called Tarzan by name. Again and again he shrieked his warning to the ape-man, but without eliciting any reply or any information that the great Tarmangani had either heard or understood him. Manu was mystified. What had occurred to render Tarzan of the Apes so indifferent to the warnings of his old friend?