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.