the monkeys about the ruins of Opar that the occurrence left Cadj's mind almost as quickly as the monkey disappeared from his view, and in the gathering gloom he did not see the little gray figure scampering off across the valley toward the band of intruders who now appeared to have stopped to rest at the foot of a large kopje that stood alone out in the valley, about a mile from the city.
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?
At last the little monkey gave it up and looked longingly back in the direction of the trees within the walled city of Opar . It was now very dark and he trembled at the thought of recrossing the valley, where he knew enemies might prowl by night. He scratched his head and he hugged his knees, then sat there whimpering, a very forlorn and unhappy little ball of a monkey. But however uncomfortable he was upon the high kopje, he was comparatively safe, and so he decided to remain there during the night rather than venture the terrifying return trip through the darkness. Thus it was that he saw the ladder completed and erected against the side of the kopje; and when the moon rose at last and lighted the scene, he saw Tarzan of the Apes urging his men to mount the ladder. He had never seen Tarzan thus rough and cruel with the blacks who accompanied him. Manu knew how ferocious the great Tarmangani could be with an enemy, whether man or beast, but he had never seen him accord such treatment to the blacks who were his friends.
One by one and with evident reluctance the blacks ascended the ladder, continually urged forward to greater speed by the sharp spear of the white man; when they had all ascended Tarzan followed, and Manu saw them disappear apparently into the heart of the great rock.
It was only a short time later that they commenced to reappear, and now each was burdened by two heavy objects which appeared to Manu to be very similar to some of the smaller stone blocks that had been used in the construction of the buildings in Opar. He saw them take the blocks to the edge of the kopje and cast them over to the ground beneath, and when the last of the blacks had emerged with his load and cast it to the valley below, one by one the party descended the ladder to the foot of the kopje. But this time Tarzan of the Apes went first. Then they lowered the ladder and took it apart and laid its pieces close to the foot of the cliff, after which they took up the blocks which they had brought from the heart of the kopje, and following Tarzan, who set out in the lead, they commenced to retrace their steps toward the rim of the valley.
Manu would have been very much mystified had he been a man, but being only a monkey he saw only what he saw without attempting to reason very much about it. He knew that the ways of men were peculiar, and oftentimes unaccountable. For example, the Gomangani who could not travel through the jungle and the forest with the ease of any other of the animals which frequented them, added to their difficulties by loading themselves down with additional weights in the form of metal anklets and armlets, with necklaces and girdles, and with skins of animals, which did nothing more than impede their progress and render life much more complicated than that which the untrammeled beasts enjoyed. Manu, whenever he gave the matter a thought, congratulated himself that he was not a man—he pitied the foolish, unreasonable creatures.
Manu must have slept. He thought that he had only closed his eyes a moment, but when he opened them the rosy light of dawn had overspread the desolate valley. Just disappearing over the cliffs to the northeast he could see the last of Tarzan's party commencing the descent of the barrier, then Manu turned his face toward Opar and prepared to descend from the kopje, and scamper back to the safety of his trees within the walls of Opar.
But first he would reconnoiter—Sheeta, the panther, might be still abroad, and so he scampered around the edge of the kopje to a point where he could see the entire valley floor between himself and Opar. And there it was that he saw again that which filled him with greatest excitement. For, debouching from the ruined outer wall of Opar was a large company of Opar's frightful men—fully a hundred of them Manu could have counted had Manu been able to count.
They seemed to be coming toward the kopje, and he sat and watched them as they approached, to defer his return to the city until after the path was cleared of hated Oparians. It occurred to him that they were coming after him, for the egotism of the lower animals is inordinate. Because he was a monkey, the idea did not seem at all ridiculous and so he hid behind a jutting rock, with only one little, bright eye exposed to the enemy. He saw them come closer and he grew very much excited, though he was not at all afraid, for he knew that if they ascended one side of the kopje he could descend the other and be half-way to Opar before they could possibly locate him again.
On and on they came, but they did not stop at the kopje— as a matter of fact they did not come very close to it, but continued on beyond it. Then it was that the truth of the matter flashed into the little brain of the monkey— Cadj and his people were pursuing Tarzan of the Apes to slay him. If Manu had been offended by Tarzan's indifference to him upon the night before, he had evidently forgotten it, for now he was quite as excited about the danger which he saw menace the ape-man as he had been upon the afternoon previous. At first he thought of running ahead, and again warning Tarzan, but he feared to venture so far from the trees of Opar, even if the thought of having to pass the hated Oparians had not been sufficient to deter him from carrying out this plan. For a few minutes he sat watching them, until they had all passed the kopje, and then it became quite clear to him that they were heading directly for the spot at which the last of Tarzan's party had disappeared from the valley—there could be no doubt that they were in pursuit of the ape-man.
Manu scanned the valley once more toward Opar. There was nothing in sight to deter him from an attempted return, and so, with the agility of his kind, he scampered down the vertical face of the kopje and was off at great speed toward the city's wall. Just when he formulated the plan that he eventually followed it is difficult to say. Perhaps he thought it all out as he sat upon the kopje, watching Cadj and his people upon the trail of the ape-man, or perhaps it occurred to him while he was scampering across the barren waste toward Opar. It may just have popped into his mind from a clear sky after he had regained the leafy sanctuary of his own trees. Be that, however as it may, the fact remains, that as La, High Priestess and princess of Opar, in company with several of her priestesses, was bathing in a pool in one of the temple gardens, she was startled by the screaming of a monkey, swinging frantically by his tail from the branch of a great tree which overspread the pool—it was a little gray monkey with a face so wise and serious that one might easily have imagined that the fate of nations lay constantly upon the shoulders of its owner.
'La, La,' it screamed, 'they have gone to kill Tarzan. They have gone to kill Tarzan.'
At the sound of that name La was instantly all attention. Standing waist deep in the pool she looked up at the little monkey questioningly. What do you mean, Manu?' she asked. 'It has been many moons since Tarzan was at
