Numa was roaring almost continually now. It was quite evident that he was coming down into the desert to hunt. It was the roar of a hungry lion. Tarzan envied him, for he was free. No one would tie him with ropes and slaughter him like a sheep. It was that which galled the ape-man. He did not fear to die, no—it was the humiliation of defeat before death, without even a chance to battle for his life.

It must be near midnight, thought Tarzan. He had several hours to live. Possibly he would yet find a way to take Rokoff with him on the long journey. He could hear the savage lord of the desert quite close by now. Possibly he sought his meat from among the penned animals within the douar.

For a long time silence reigned, then Tarzan’s trained ears caught the sound of a stealthily moving body. It came from the side of the tent nearest the mountains—the back. Nearer and nearer it came. He waited, listening intently, for it to pass. For a time there was silence without, such a terrible silence that Tarzan was surprised that he did not hear the breathing of the animal he felt sure must be crouching close to the back wall of his tent.

There! It is moving again. Closer it creeps. Tarzan turns his head in the direction of the sound. It is very dark within the tent. Slowly the back rises from the ground, forced up by the head and shoulders of a body that looks all black in the semi-darkness. Beyond is a faint glimpse of the dimly starlit desert. A grim smile plays about Tarzan’s lips. At least Rokoff will be cheated. How mad he will be! And death will be more merciful than he could have hoped for at the hands of the Russian.

Now the back of the tent drops into place, and all is darkness again—whatever it is is inside the tent with him. He hears it creeping close to him—now it is beside him. He closes his eyes and waits for the mighty paw. Upon his upturned face falls the gentle touch of a soft hand groping in the dark, and then a girl’s voice in a scarcely audible whisper pronounces his name.

“Yes, it is I,” he whispers in reply. “But in the name of Heaven who are you?”

“The Ouled-Nail of Sisi Aissa,” came the answer. While she spoke Tarzan could feel her working about his bonds. Occasionally the cold steel of a knife touched his flesh. A moment later he was free.

“Come!” she whispered.

On hands and knees he followed her out of the tent by the way she had come. She continued crawling thus flat to the ground until she reached a little patch of shrub. There she halted until he gained her side. For a moment he looked at her before he spoke.

“I cannot understand,” he said at last. “Why are you here? How did you know that I was a prisoner in that tent? How does it happen that it is you who have saved me?”