That badge would have got him immediate attention on any landing field. Now, on the flat roof, with steady, gray eyes and a voice whose very quietness accentuated its imperative commands, Chet had the staff of the hospital hangars as alert as if their alarm had sounded a general ambulance call.

Straight into the sky a red beacon made a rigid column of light; a radio sender was crackling a warning and a demand for "clear air."

From the forty level, a patrol ship that had caught the signal came corks.c.r.e.w.i.n.g down the red shaft to stand by for emergency work....

Chet called her commander from the cabin of Diane's ship. A word of thanks--Chet's number--and a dismissal of the craft. Then the white lights signaled "all clear" and the hold-down levers let go with a soft hiss--

The feel of the controls was good to his hands; the ship roared into life. A beautiful little cruiser, this ship of Diane's; her twin helicopters lifted her gracefully into the air. The column of red light had changed to blue, the mark of an ascending area; Chet touched a switch. A m.u.f.fled roar came from the stern and the blast drove him straight out for a mile; then he swung and returned. He was nosing up as he touched the blue--straight up--and he held the vertical climb till the altimeter before him registered sixty thousand.

Traffic is north-bound only on the sixty-level, and Chet set his ship on a course for the frozen wastes of the Arctic; then he gave her the gun and nodded in tight-lipped satisfaction at the mounting thunder that answered from the stern.

Only then did he read again the message on a torn fragment of telautotype paper. "Harkness," was the signature; and above, a brief warning and a call--"Danger--must leave at once. You get ship and stand by. I will meet you there." And, for the first time, Chet found time to wonder at this danger that had set the hard-headed, hard-hitting Walt Harkness into a flutter of nerves.

What danger could there be in this well-guarded world? A patrol-ship pa.s.sed below him as he asked himself the question. It was symbolic of a world at peace; a world too busy with its own tremendous development to find time for wars or makers of war. What trouble could this man Schwartzmann threaten that a word to the Peace Enforcement Commission would not quell? Where could he go to elude the inescapable patrols?

And suddenly Chet saw the answer to that question--saw plainly where Schwartzmann could go. Those vast reaches of black s.p.a.ce! If Schwartzmann had their ship he could go where they had gone--go out to the Dark Moon.... And Harkness had warned Chet to get their ship and stand by.

Had Walt learned of some plan of Schwartzmann's? Chet could not answer the question, but he moved the control rheostat over to the last notch.

From the body of the craft came an unending roar of a generator where nothing moved; where only the terrific, explosive impact of bursting detonite drove out from the stern to throw them forward. "A good little ship," Chet had said of this cruiser of Diane's; and he nodded approval now of a ground-speed detector whose quivering needle had left the 500 mark. It touched 600, crept on, and trembled at 700 miles an hour with the top speed of the ship.

There was a position-finder in the little control room, and Chet's gaze returned to it often to see the pinpoint of light that crept slowly across the surface of a globe. It marked their ever-changing location, and it moved unerringly toward a predetermined goal.

It was a place of ice and snow and bleak outcropping of half-covered rocks where he descended. Lost from the world, a place where even the high levels seldom echoed to the roar of pa.s.sing ships, it had been a perfect location for their "shop." Here he and Walt had a.s.sembled their mystery ship.

He had to search intently over the icy waste to find the exact location; a dim red glow from a hidden sun shone like pale fire across distant black hills. But the hills gave him a bearing, and he landed at last beside a vaguely outlined structure, half hidden in drifting snow.

The dual fans dropped him softly upon the snow ground and Chet, as he walked toward the great locked doors, was trembling from other causes than the cold. Would the ship be there? He was suddenly a-quiver with excitement at the thought of what this ship meant--the adventure, the exploration that lay ahead.

The doors swung back. In the warm and lighted room was a cylinder of silvery white. Its bow ended in a gaping port where a mighty exhaust could roar forth to check the ship's forward speed; there were other ports ranged about the gleaming body. Above the hull a control-room projected flatly; its lookouts shone in the brilliance of the nitron illuminator that flooded the room with light....

Chet Bullard was breathless as he moved on and into the room. His wild experiences that had seemed but a weird dream were real again. The Dark Moon was real! And they would be going back to it!

The m.u.f.fled beating of great helicopters was sounding in his ears; outside, a ship was landing. This would be Harkness coming to join him; yet, even as the thought flashed through his mind, it was countered by a quick denial. To the experienced hearing of the Master Pilot this sound of many fans meant no little craft. It was a big ship that was landing, and it was coming down fast. The blue-striped monster looming large in the glow of the midnight sun was not entirely a surprise to Chet's staring eyes.

But--blue-striped! The markings of the Schwartzmann line!--He had hardly sensed the danger when it was upon him.

A man, heavy and broad of frame, was giving orders. Only once had Chet seen this Herr Schwartzmann, but there was no mistaking him now. And he was sending a squad of rushing figures toward the man who struggled to close a great door.

Chet crouched to meet the attack. He was outnumbered; he could never win out. But the knowledge of his own helplessness was nothing beside that other conviction that flooded him with sickening certainty--

A hoax!--that was what they had called Walt's story; Schwartzmann had so named it, and now Schwartzmann had been the one to fool them; the message was a fake--a bait to draw him out; and he, Chet, had taken the bait. He had led Schwartzmann here; had delivered their ship into his hands--

He landed one blow on the nearest face; he had one glimpse of a clubbed weapon swinging above him--and the world went dark.

CHAPTER II

_Into s.p.a.ce_

A pulsing pain that stabbed through his head was Chet's first conscious impression. Then, as objects came slowly into focus before his eyes, he knew that above him a ray of light was striking slantingly through the thick gla.s.s of a control-room lookout.

Other lookouts were black, the dead black of empty s.p.a.ce. Through them, sparkling points of fire showed here and there--suns, sending their light across millions of years to strike at last on a speeding ship. But, from the one port that caught the brighter light, came that straight ray to illumine the room.

"s.p.a.ce," thought Chet vaguely. "That is the sunlight of s.p.a.ce!"

He was trying to arrange his thoughts in some sensible sequence. His head!--what had happened to his head?... And then he remembered. Again he saw a clubbed weapon descending, while the face of Schwartzmann stared at him through bulbous eyes....

And this control-room where he lay--he knew in an instant where he was. It was his own ship that was roaring and trembling beneath him--his and Walt Harkness'--it was flying through s.p.a.ce! And, with the sudden realization of what this meant, he struggled to arise. Only then did he see the figure at the controls.

The man was leaning above an instrument board; he straightened to stare from a rear port while he spoke to someone Chet could not see.

"There's more of 'em coming!" he said in a choked voice. "_Mein Gott!_ Neffer can we get away!"

He fumbled with shaking hands at instruments and controls; and now Chet saw his chalk-white face and read plainly the terror that was written there. But the cords that cut into his own wrists and ankles reminded him that he was bound; he settled back upon the floor. Why struggle? If this other pilot was having trouble let him get out of it by himself--let him kill his own snakes!

That the man was having trouble there was no doubt. He looked once more behind him as if at something that pursued; then swung the ball-control to throw the ship off her course.

The craft answered sluggishly, and Chet Bullard grinned where he lay helpless upon the floor; for he knew that his ship should have been thrown crashingly aside with such a motion as that. The answer was plain: the flask of super-detonite was exhausted; here was the last feeble explosion of the final atoms of the terrible explosive that was being admitted to the generator. And to cut in another flask meant the opening of a hidden valve.

Chet forgot the pain of his swelling hands to shake with suppressed mirth. This was going to be good! He forgot it until, through a lookout, he saw a writhing, circling fire that wrapped itself about the ship and jarred them to a halt.

The serpents!--those horrors from s.p.a.ce that had come with the coming of the Dark Moon! They had disrupted the high-level traffic of the world; had seized great liners; torn their way in; stripped these of every living thing, and let the empty sh.e.l.ls crash back to earth. Chet had forgotten or he had failed to realize the height at which this new pilot was flying. Only speed could save them; the monsters, with their snouts that were great suction-cups, could wrench off a metal door--tear out the gla.s.s from a port!

He saw the luminous ma.s.s crush itself against a forward lookout and felt the jar of its body against their ship. Soft and vaporous, these cloud-like serpents seemed as they drifted through s.p.a.ce; yet the impact, when they struck, proved that this new matter had ma.s.s.

Chet saw the figure at the controls stagger back and cower in fear; the man's bullet-shaped head was covered by his upraised arms: there was some horror outside those windows that his eyes had no wish to see. Beside him the towering figure of Schwartzmann appeared; he had sprung into Chet's view, and he screamed orders at the fear-stricken pilot.

"Fool! Swine!" Schwartzmann was shouting. "Do something! You said you could fly this ship!" In desperation he leaped forward and reached for the controls himself.

Chet's blurred faculties snapped sharply to attention. That yellow glow against the port--the jarring of their ship--it meant instant destruction once that searching snout found some place where it could secure a hold. If the air-pressure within the ship were released; if even a crack were opened!--

"Here, you!" he shouted to the frantic Schwartzmann who was jerking frenziedly at the controls that no longer gave response. "Cut these ropes!--leave those instruments alone, you fool!" He was suddenly vibrant with hate as he realized what this man had done: he had struck him, Chet, down as he would have felled an animal for butchery; he had stolen their ship; and now he was losing it. Chet hardly thought of his own desperate plight in his rage at this threat to their ship, and at Schwartzmann's inability to help himself.

"Cut these ropes!" he repeated. "d.a.m.n it all, turn me loose; I can fly us out!" He added his frank opinion of Schwartzmann and all his men.

And Schwartzmann, though his dark face flushed angrily red for one instant, leaped to Chet's side and slashed at the cords with a knife.

The room swam before Chet's dizzy eyes as he came to his feet. He half fell, half drew himself full length toward the valve that he alone knew. Then again he was on his feet and he gripped at the ball-control with one hand while he opened a master throttle that cut in this new supply of explosive.