And there was another thing he knew: The Reds must _not_ find this. Such a discovery on their part would not only mean the end of his own people on Topaz, but the end of Terra as well. This could be a new and alien Black Death spread to destroy whole nations at a time! If he could--much as his archaeologist's training would argue against it--he would blot out this whole valley above and below ground. But while the Reds might possess a means of such destruction, the Apaches did not. No, he and his people must prevent its discovery by the enemy by doing what he had seen as necessary from the first--wiping out the Red leaders! And that must be done before they chanced upon the towers! Travis arose stiffly. His eyes ached, his head felt stuffed with pictures, hints, speculations. He wanted to get out, back into the open air where perhaps the clean winds of the heights would blow some of this frightening half knowledge from his benumbed mind. He lurched down the corridor, puzzled now by the problem of getting back to the window level. Here, before him, was the pillar. Without hope, but still obeying some buried instinct, Travis again set his hands to its surface. There was a tug at his cramped arms; once more his body was sucked to the pillar. This time he was rising! He held his breath past the first level and then relaxed. The principle of this weird form of transportation was entirely beyond his understanding, but as long as it worked in reverse he didn't care to find out. He reached the windowed chamber, but the sunlight had left it; instead, the clean cut of moon sweep lay on the dusty floor. He must have been hours in that underground place. Travis pulled away from the embrace of the pillar. The bar of his wooden lance was still across the window and he ran for it. To catch the scouting party at the pass he must hurry. The report they would make to the clan now had to be changed radically in the face of his new discoveries. The Apaches dared not retreat southward and withdraw from the fight, leaving the Reds to use what treasure lay here. As he hit the pavement below he looked about for the coyotes. Then he tried the mind call. But as mysteriously as they had met him in the valley, so now were they gone again. And Travis had no time to hunt for them. With a sigh, he began his race to the pass. In the old days, Travis remembered, Apache warriors had been able to cover forty-five or fifty miles a day on foot and over rough territory. But perhaps his modern breeding had slowed him. He had been so sure he could catch up before the others were through the pass. But he stood now in the hollow where they had camped, read the sign of overturned stone and bent twig left for him, and knew they would reach the rancheria and report the decision Deklay and the others wanted before he could head them off.