CHAPTER XVI

_Through Air and Water_

It was midday when they approached the heights they had reached on their flight from Fire Valley. Off to one side must lie the arena with the pyramid within. And within the pyramid--! Chet took his thoughts quickly away from that. Or perhaps it was the shrieking chatter from ahead that gave him other things to think of.

Towahg had heard them before, but Chet had not understood his signs. And now the chorus of an approaching pack of ape-men was louder with each passing minute. That they were coming along the same trail seemed certain.

Towahg sprang into the air; his gnarled hands closed on a heavy vine: he went up this hand over hand, ready to move off to one side through the leafy roof with never a sign of his going. He waited impatiently for Chet to join him, and the pilot, regarding the incredible leap of that squat ape-man body, shook his head in despair.

"Grab a loose end," he told Towahg. "Lower a rope--a vine. Get it down where I can reach it!" And he raved inwardly at the blank look on the savage face while he held himself in check and made signs over and over in an effort to get the idea across.

Towahg got it at last. He lowered a vine and hauled Chet up with jerks that almost tore the pilot's hands from their hold on the rough bark. Then off to one side! And they waited in the shelter of concealing leaves while the yelling pack drew near and a hundred or more of them raced by along the trail below.

Invisible to Chet was the marked trail where Kreiss had gone, but these savage things ran at top speed and read it as they ran.

Were they puzzled by the sudden increase in markings? Did they sense that some were more recent than those they had followed? Chet could not say. But he saw the pack return, staring curiously about until they swung off and vanished through the trees toward the west. And in that direction lay the arena and the haunt of a horror unknown.

Yet Chet lowered himself to the ground with steady hands and motioned Towahg where the yelling mob had gone.

"We'll go that way," he said; "we'll follow them up. And perhaps, if I can only get the idea into your thick head, we can learn what their plans are: find out if Kreiss has really thrown us in their hands--led them as straight as a pack of wolves could run to the quiet peace of Happy Valley."

* * * * *

Chet might have followed them into the arena itself: he felt so keenly that he must know with certainty whether or not the pack would continue their pursuit. And why had they turned back? he asked himself. Had they returned to acquaint their horrible god and his hypnotised slaves with what they had learned?

But the trail turned off from the rocky waste where the arena lay; it took them west and south for another mile, until again to Chet's ears came the chattering bedlam of monkey-talk that was almost human. And now they moved more cautiously from rock to tree and through the concealing shadows until they could look into a shallow valley ahead. But before Chet looked he was prepared for a surprising scene. For over and above the raucous calling of the ape-folk had come another deeper tone.

"_Gott im Himmel!_" the deep voice said. "One at a time, you _verdammt_ beasts. Beat them on the head, Max; make them shut up!"

And the big bulk of Schwartzmann, when Chet first saw him, was seated on a high rock that was like a barbaric throne in a valley of green. About him the ape-men leaped and grimaced and made futile animal efforts to tell him of their discovery.

"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.

* * * * *

He stopped at the clearing, while Towahg urged him on across the smooth rock. Chet shook his head and pointed away from the direction of the big divide, and at last he made him understand. Then Towahg did what Chet never could have done.

He followed their former trail across the stone, his head close to the ground. Now he picked a bruised leaf: again he replaced a turned stone whose markings showed it had been displaced, and he came back over an area that even an ape-man would not follow as being a place where men had gone.

From where they emerged he turned as Chet had pointed, crossed the clearing as clumsily as the German scientist might have done, scuffed his bare feet in a pocket of gravel, and pointed to soft earth where Chet might walk and leave a mark of shoes. Chet grinned happily while Towahg did his grotesque dance that indicated satisfaction, though from afar the first cries of the pack rang in the air.

They could never have outdistanced the apes alone, Chet knew that. But he also knew that Schwartzmann and the others would slow them up, and he counted on the pack staying together on the trail as they traversed this new country. He entered the jungle with Towahg where their new trail led, and drove his tired muscles to greater speed while Towahg, always in the lead, motioned him on.

There were stops for food at times until another night came, and Chet threw himself down on a mat of grass and fell instantly asleep. If there was danger abroad he neither knew nor cared. He knew only that every muscle of his body was aching from the forced march, and that Towahg's twitching ears were on guard.

The following day they went more slowly, stopping at times to wait for the sounds of pursuit. They were leading the pack on a long journey; Chet wanted to be sure they were following and had not turned back. He left a plain mark of his boot from time to time, and knew that this mark would be shown to Schwartzmann. With that to lead him there would be no stopping the man: he would drive his army of blacks despite their superstitious fears.

The short days and nights formed an endless succession to Chet. Only once did he see a familiar place, as they passed a valley and he saw where their ship had rested on that earlier voyage.

"This is far enough," he told Towahg, and made himself plain with signs. "Now we'll lose them; hang them right up in the air and leave them there."

Another steep climb and a valley beyond, and in the hollow a tumbling stream. There was no need to tell Towahg what to do, for he led straight for the water, and his thick legs churned through it as he headed down stream; nor did he stop until they had covered many miles.

Chet had wondered how they would leave the water without trace, but again Towahg was ready. A stone where the water splashed would show no mark of bare feet. From it he leaped into the air toward a swaying vine. He missed, tried again, and finally grasped it. And the rest was a repetition of what had been done before.

* * * * *

He lowered a vine as Chet had taught him, pulled the slim figure of Chet up to the dizzy heights of the jungle trees, then took Chet's one arm in a grip of chilled steel and threw him across his back, while he swung sickeningly from limb to limb, up through the branches of another grotesque tree where its queerly distorted limbs sagged and swung them to its fellow some fifty feet away.

It was a wild ride for the pilot. "I've driven everything that's made with an engine in it," he told himself, "but this one-ape-power craft has them all stopped for thrills."

And at last when even Towahg's chest that seemed ribbed with steel, was rising and falling with his great breaths, Chet found himself set down on the ground, and he patted the black on the shoulder in the gesture that meant approval.

"Water and air," he said; "it'll bother them to trail us over that route. Towahg, you're there when it comes to trapeze work. Now, if you can find the way back again--!"

And Towahg could, as Chet admitted when, after a series of eventless days, they came again to the big divide above the reaches of Happy Valley.

And the grip of Harkness' hand, and the tears in Diane's eyes brought a choke to his throat until the voluble apologies of a penitent Herr Kreiss and the antics of a Towahg, recipient of many approving pats, turned the emotion into the safer channel of laughter.

"But I think we switched them off for good," Chet said, in conclusion of his recital; "I believe we are as safe as we ever were. And I've only one big regret:

"If I could just have been around somewhere when friend Schwartzmann found his scouts had led him up a blind alley, it would have been worth the trip. He did pretty well when he started cussing us out before; I'll bet he pumped his vocabulary dry on them this time."