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 muffled 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 passed 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 space! 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 passing ships, it had been a perfect location for their "shop." Here he and Walt had assembled 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 muffled 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 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 Space

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 glass of a control-room lookout.

Other lookouts were black, the dead black of empty space. 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.

"Space," thought Chet vaguely. "That is the sunlight of space!"

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 space! 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