The l.u.s.t of battle was upon him. A fleet of the Zar's aeros had risen from below; twenty of them at least. These would be manned by Moon creatures, he knew, and would carry all of the dreadful weapons which had originated on that strange body. But he did not know that his own ships were insulated against most of the rays used by the Zar's forces.

He knew only that he must fight; fight and kill; exterminate every last one of the Zar's adherents or be exterminated in the attempt.

Kill! Kill! The madness was contagious. His pilot was a marvel and drove his ship straight for the ma.s.sed ships of the foe. The air was vivid with light-streamers. A ray from an enemy vessel struck the thick gla.s.s of the port through which he looked and the outer surface was shattered and pock-marked. But a cloud of vapor and a dripping stream of fiery liquid told him his own ray had taken effect on a vessel of the enemy.

One! They wheeled about and spiraled, coming up under another of the Zar's aeros. It vanished in a puff of steam and they narrowly missed being covered by the falling remnants of incandescent liquid. Two!

Karl's aim was good and he gloated in the fact. Three! They climbed and turned over, dropping again into the fray. Four!

The air grew stifling, for the expended energy of the enemies' rays must needs be absorbed. It could not disintegrate them nor decompose their bodies, but the contacts were many and the liberation of heat enormous.

They were suffocating! But Karl would not desist. They drove on, now beneath, now above an enemy ship. He lost count.

One of his own vessels was in trouble. The report came to him from the little speaker at his ear. He looked around in alarm. A glowing object reeled uncertainly over there between two of the aeros of the Zar. The concentration of beams of vibrations was too much for the st.u.r.dy craft.

It was red hot and its occupants burned alive where they sat. Suddenly it slipped into a spin and went slithering down into the city, leaving a gaping opening where it fell. This sobered him somewhat, but he went into the battle with renewed fury.

How many had they brought down? Fifteen? Sixteen? He tore his purple jacket from his body. The perspiration rolled from his pores. His own ship would be next. But what did it matter? Kill! Kill! He shouted once more into the microphone, then dived into battle. Another and another!

In Heaven's name, how many were there? It was maddening. If only he could breathe. His lungs were seared; his eyes smarting from the heat.

And then it was over.

Three of the Zar's aeros remained, and these turned tail to run for it.

No! They were falling, nose down, under full power; diving into the city from which they had come. Suicide? Yes. They couldn't face the recriminations that must come to them. And anything was better than facing that burning death from the strange little fighters which had come from out the skies. Dorn was a ma.s.s of wreckage.

Karl tore at the fastenings of the ports, searing his fingers on the heated metal. His pilot had collapsed, the little aero heading madly skyward with no guiding hand. Air! They must have air! He loosened the pilot's jacket; slapped frantically at his wrists in the effort to bring him to consciousness. Then he was at the controls of the vessel, tugging on first one, then the other. The aero circled and spun, executing the most dangerous of sideslips and dives. A little voice was speaking to him--the voice of the radio--instructing him. In a daze he followed instructions as best he could. The whirlings of the earth stabilized after a time and he found he was flying the vessel; climbing rapidly.

A sense of power came to him as the little voice of the radio continued to instruct. Here were the controls of the electronic motor; there the gravity-energy. He was proceeding in the wrong direction. But what did it matter? He learned the meaning of the tiny figures of the altimeter; the difference between the points of the compa.s.s. Still he drove on.

"East! Turn East!" begged the little voice from the radio. "You're heading west. Your speed--a thousand kilometers an hour--it's too fast.

Turn back, Zar Peter!"

He tore the loud speaker of the radio from its fastenings. West! He wanted to go west! On and on he sped, becoming more and more familiar with the workings of the little vessel as he progressed. A cooling breeze whistled from the opened ports, a breeze that smelled of the sea.

His heart sang with the wonder of it all. He could fly. And fly he did.

Zar Peter? Never! He knew now where he belonged; knew what he wanted.

He'd find the coast of North America. Follow it until he located New York. A landing would be easy, for had not the voice instructed him in the use of the gravity-energy? He'd make his way to the lower levels, to the little book shop of Rudolph Kra.s.sin. A suit of gray denim awaited him there and he'd never discard it.

Onward he sped into the night, which was falling fast. He held to his westward course like a veteran of the air lanes. The pilot had ceased to breathe and Karl was sorry. Game little devil, that pilot. Have to shove his body overboard. Too bad.

Rudolph's brother would understand. He'd be watching in the detectoscope.

And the others--those who had wished to seat him on a throne--they'd understand, too. They'd have to!

Rudolph would forgive him, he knew. Paul Van Dorn--his own cousin--the secret agents of the Zar would never locate him! Too many friends of Rudolph's were of the red police.

He gave himself over to happy thoughts as the little aero sped on in the darkness. Home! He was going home! Back to the gray denim, where he belonged and where now he would remain content.

The Ape-Men of Xlotli

_By David R. Sparks_

A beautiful face in the depths of a geyser--and Kirby plunges into a desperate mid-Earth conflict with the dreadful Feathered Serpent.

CHAPTER I

Kirby did not know what mountains they were. He did know that the Mannlicher bullets of eleven bad Mexicans were whining over his head and whizzing past the hoofs of his galloping, stolen horse. The shots were mingled with yelps which pretty well curdled his spine. In the circ.u.mstances, the unknown range of snow mountains towering blue and white beyond the arid, windy plateau, offering he could not tell what dangers, seemed a paradise. Looking at them, Kirby laughed harshly to himself.

As he dug the heels of his aviator's boots into the stallion's flanks, the animal galloped even faster than before, and Kirby took hope. Then more bullets and more yelps made him think that his advantage might prove only temporary. Nevertheless, he laughed again, and as he became accustomed to the feel of a stallion under him, he even essayed a few pistol shots back at the pack of frantic, swarthy devils he had fooled.

[Ill.u.s.tration: _His head wavered back and forth and his hiss filled the night._]

Three hours ago he had been eating a peaceful breakfast with his friend and commandant, Colonel Miguel de Castanar, in the sunlit patio of the commandant's hacienda. Castanar, chief of the air patrol for the district, had waxed enthusiastic over the suppression of last spring's revolutionists and the cowed state of up-country bandits. Captain Freddie Kirby, American instructor of flying to Mexican pilots in the making, had agreed with him and asked for one of the Wasps and three days' leave with which to go visiting in Laredo. The simple matter of a broken fuel line, a forced landing two hundred kilometres from nowhere, and the unlucky proximity of the not-so-cowed hors.e.m.e.n, were the things which had changed the day from what it had been to what it was.

The one piece of good fortune which had befallen him since the bandits had surrounded the wrecked Wasp, looted it, and taken its lone pilot prisoner, was the break he was getting now. During the squadron's first halt to feed, he had knocked down his guards and made a bolt for the grazing stallion. So far, the attempt was proving worth while.

On and on the stallion lunged toward the white mountains. Kirby's eyes became red rimmed now from fatigue and the glare of the sun and the dust of the pitilessly bare plateau. A negligible scalp wound under his mop of straw-colored hair, slight as it was, did not add to his comfort. But still he would not give up, for the horse, as if it sensed what its rider needed most, was making directly for a narrow ravine which debouched on the plateau from the nearest mountain flank.

It was the promise of cover afforded by the jagged rocks and jungle growth of that ravine which kept hope alive in Kirby's throbbing brain.

The stallion was blown and staggering. Foam from the heavily bitted mouth flashed back in great yellow flakes against Kirby's dust-caked aviator's tunic. But just the same, the five mile gallop had carried both horse and rider beyond range of any but the most expert rifle shot.

And Kirby knew that if his own splendid mount was almost ready to crash, the horses of his pursuers must be in worse shape still. So for the third time since the fight had begun, he laughed. This time there was no harshness, but only relief, in the sound which came from his dry lips.

Ten minutes later, he flung himself out of his saddle. Like the caress of a vast, soothing hand, the shadowed coolness of the ravine lay upon him. As his feet struck ground, they splashed in the water overflowing from a spring at the base of an immense rock. At once Kirby dropped the reins on the stallion's neck, giving him his freedom, and as the horse lowered his head to drink, Kirby stooped also.

There was cover everywhere. Kirby's first move after pulling both himself and the horse away from the spring, was to glance up the long, deeply shaded canyon which he had entered--a gash hacked into the breast of the steep mountain as by a t.i.tanic ax. Then, rea.s.sured as to the possibilities for a defensive retreat, he glanced back toward the dazzling, bare plateau.

It was what he saw taking place amongst the sombreroed bandits out there which made the grin of satisfaction fade from his broad mouth. His last glance backward, before bolting into the canyon mouth, had showed him a ragged squadron of men left far behind, yet galloping after him still.

But now--

Presently a puzzled frown made wrinkles in Freddie Kirby's wide sunburned forehead. He relaxed his grip upon the heavy Luger, which, in his big hands, looked like a cap pistol, and rubbed his eyes.

But he was not mistaken. The hors.e.m.e.n had halted! Out there on the glaring, alkali-arid plateau, they were standing as still as so many statues. Looking toward the canyon mouth which had swallowed their quarry, they certainly were, but they were halted as completely as men struck dead.

"Huh," Kirby grunted, and scratched behind his ear.

The next second he swung around to look at his horse, uncertain what he was going to do next, but aware of the fact that right now, with a lot of unknown country between himself and Castanar's sunlit patio, the stallion was going to be a friend in need.

As he turned, however, prepared to take up the loose reins, something else happened. The stallion let out a neigh as shrill as a trumpet blast. As Kirby jumped, grabbed for the bridle, his fingers found empty air. Like a crazy animal the stallion leaped past him, barely missing him. Out toward the plain the horse jumped, out and away from the shaded canyon mouth, out toward the spot where other horses waited. And despite the animal's blown condition, the speed he put into his retreat left Kirby dazed.

After a helpless, profanity-filled second, Kirby scratched behind his ear again. As certain as the fact that almost his sole hope of getting back to civilization depended upon the stallion, was the fact that the brute did not intend to stop running until he dropped.