"They've found something, Max," Schwartzmann said to his pilot. "Get the other two men. We'll go with the dirty brutes. And if they've got wind of those others--" His remarks concluded with a sputtering of profanity whose nature was not obscured by its being given in another language. And Chet knew that the obscenities were intended for his companions and himself. Schwartzmann's booming voice came plainly even above the chorus of coughing growls and shriller chatter. Chet saw him showing his detonite pistol in a half-threatening motion, and the ape-men cringed away in fear. "Not so well trained an army, Max, that I am general of, but if we find that man, Harkness, and his pilot and that traitor Kreiss, we will let these soldiers of mine tear them to little bits. Now, we go!" Max's call had brought the other two men of Schwartzmann's party, and the black horde of ape-men broke into a wild run across the grass toward the place where Chet and Towahg lay. The two slipped hurriedly into the concealment of denser growth, then ran at top speed down a jungle trail that led off to one side. * * * * * They were bedded down for the night on the edge of the white forest; no persuasion of Schwartzmann's would have driven the ape-men into the darkness of the black trees and their flashing, luminous worm-beasts. Chet and Towahg came within hearing of their encampment just at dusk, and a late-rising moon broke through the gaps in the leafy roof to make splotched islands of gold in the velvet dark where Chet and Towahg fought the jungle so they might swing around and past the camp. Occasional grunts and scufflings showed that the ape-men were restless, and the two knew that every step must be taken in silence and every obstructing leaf moved with no rasping friction on other leaves or branches. But they came again to the trail, and now they were ahead of the pack, as the first gray light of dawn was stealing through the ghostly white of the trees. Towahg would have curled himself into a sleepy ball a score of times had Chet not driven him on, and now the pilot only allowed a few minutes for food, where ripe purple fruit hung in clusters on the end of stems that were like ropes. No use to explain to Towahg. Perhaps the ape-man thought they were hurrying to get through the black forest; he might even have thought the matter through to see the necessity for reaching their own valley and warning the others. Certainly he had no idea of any plans other than these, and he must have been puzzled some several hours later when Chet halted where the trail had crossed a barren expanse of rock. Towahg had stopped there on the way down. Then he had sniffed the air, dropped his head low and circled about, motioning Chet to follow, from across the clearing where he had picked up the trail. Chet knew the ape-men would do the same unless they were diverted, and he had a plan. To communicate it to his assistant was his greatest problem.