Now he moved in an almost direct line so that he overtook the expedition as it made camp for the night. As he watched them from behind a leafy screen of high-flung foliage, he noticed, though with no surprise, that they were not burdened with any treasure from Opar.
As the success and happiness of jungle dwellers, nay, even life itself, is largely dependent upon their powers of observation, Tarzan had developed his to a high degree of perfection. At his first encounter with this party he had made himself familiar with the faces, physiques and carriages of all of its principals and of many of its humble warriors and porters, with the result that he was immediately aware that Colt was no longer with the expedition. Experience permitted Tarzan to draw a rather accurate picture of what had happened at Opar and of the probable fate of the missing man.
Years ago he had seen his own courageous Waziri turn and flee upon the occasion of their first experience of the weird warning screams from the ruined city, and he could easily guess that Colt, attempting to lead the invaders into the city, had been deserted and found either death or capture within the gloomy interior. This, however, did not greatly concern Tarzan. While he had been rather drawn toward Colt by that tenuous and invisible power known as personality, he still considered him as one of his enemies, and if he were either dead or captured Tarzan's cause was advanced by that much.
From Tarzan's shoulder Nkima looked down upon the camp, but he kept silent as Tarzan had instructed him to do. Nkima saw many things that he would have liked to have possessed, and particularly he coveted a red calico shirt worn by one of the askaris. This, he thought, was very grand, indeed, being set off as it was by the unrelieved nakedness of the majority of the blacks. Nkima wished that his master would descend and slay them all, but particularly the man with the red shirt; for, at heart, Nkima was bloodthirsty, which made it fortunate for the peace of the jungle that he had not been born a gorilla. But Tarzan's mind was not set upon carnage. He had other means for thwarting the activities of these strangers. During the day he had made a kill, and now he withdrew to a safe distance from the camp and satisfied his hunger, while Nkima searched for birds' eggs, fruit, and insects.
And so night fell and when it had enveloped the jungle in impenetrable darkness, relieved only by the beast fires of the camp, Tarzan returned to a tree where he could overlook the activities of the bivouacked expedition. He watched them in silence for a long time, and then suddenly he raised his voice in a long scream that perfectly mimicked the hideous warning cry of Opar's defenders.
The effect upon the camp was instantaneous. Conversation, singing, and laughter ceased. For a moment the men sat as in a paralysis of terror. Then, seizing their weapons, they came closer to the fire.
With the shadow of a smile upon his lips, Tarzan melted away into the jungle.
X
THE LOVE OF A PRIESTESS
Ibn Dammuk had bided his time and now, in the camp by the swollen river at the edge of the Galla country, he at last found the opportunity he had so long awaited. The surveillance over the two prisoners had somewhat relaxed, due largely to the belief entertained by Abu Batn that the women would not dare to invite the perils of the jungle by attempting to escape from captors who were, at the same time, their protectors from even greater dangers. He had, however, reckoned without a just estimation of the courage and resourcefulness of his two captives, who, had he but known it, were constantly awaiting the first opportunity for escape. It was this fact, as well, that played into the hands of Ibn Dammuk.