Coming over the edge of the plateau from the valley beyond, Nu saw the leaders of a herd of aurochs. Behind these must be the herders. Will the girl be able to escape them? Ah, she has seen the beasts—she has stopped and is looking about for a tree, Nu reasoned, for women are ofttimes afraid of these shaggy bulls. He remembered, with pride, that his Nat-ul feared little or nothing upon the face of the earth. She was cautious, of course, else she would not have survived a fortnight. Feared nothing! Nu smiled. There were two things that filled Nat-ul with terror—mice and earthquakes.

Now Nu sees the first of the herders upon the flanks of the herd. They are hurrying forward, spears ready, to ascertain what it is that has brought the leaders to a halt—what is causing the old king-bull to bellow and paw the earth. Will the girl see them? Can she escape them? They see her now, and at the same instant it is evident that she sees them. Is she of their people? If so, she will hasten toward them. No! She has turned and is running swiftly back toward the forest. The herders spring into swift pursuit. Nu trembled in excitement. If he only knew. If he only knew!

At his shoulder stood Gron. He had not been aware of her presence. The woman's eyes strained across the distance to the little figure racing over the clearing toward the forest. Her hands were tightly clenched against her breast. She too, had been struck with the same fear that haunted Nu. Perhaps she had received the idea telepathically from the man.

The watchers saw the herders overtake the fugitive, seize her and drag her back toward the edge of the plateau. The herd was turned back and a moment later all disappeared over the brink. Nu wavered in indecision. He knew that the captive could not be Nat-ul, and yet something urged him on to her succor. They were taking her back to the Lake Dwellings! Should he follow? It would be foolish—and yet suppose that it should be Nat-ul. Without a backward glance the man started down the cliff face. The woman behind him, reading his intention plainly, took a step after him, her arms outstretched toward him.

"Nu!" she cried. Her voice was low and pleading. The man did not turn. He had no ears, no thoughts beyond the fear and hope that followed the lithe figure of the captive girl into the hidden valley toward the distant lake.

Gron threw out her arms toward him in a gesture of supplication. For a moment she stood thus, motionless. Nu continued his descent of the cliff. He reached the bottom and started off at a rapid trot toward the forest. Gron clapped her open palm across her eyes, and, turning, staggered back to the ledge before the cave, where, with a stifled moan she sank to her knees and slipped prone upon the narrow platform.

XIV

"I HAVE COME TO SAVE YOU"

Nu reached the edge of the plateau in time to see the herders and their captive arrive at the dwellings on the lake. He saw the crowds of excited natives that ran out to meet them. He saw the captive pulled and hauled hither and thither. The herders pointed often toward the plateau behind them. It was evident that Nu's assault upon the sentry of the previous night taken with the capture of this stranger and the appearance of Nu and Gron upon the cliff the day before had filled the villagers with fear of an invasion from the south. This only could account for the early return of the herders with their aurochs.

Taking advantage of what cover the descent to the valley afforded and the bushes and trees that dotted the valley itself, Nu crept cautiously onward toward the lake. He was determined to discover the identity of the prisoner, though even yet he could not believe that she was Nat-ul. A mile from the shore he was compelled to hide until dark, for there was less shelter thereafter and, too, there were many of the natives moving to and fro, having their herds browsing in the bottom lands close to their dwellings.