man to hurry him through the doorway. It was only a gentle push: Chet wondered as he saw the man stagger and grasp at his throat. He was coughing--choking horribly for an instant outside the open port--then fell to the ground, while his legs jerked awkwardly, spasmodically.
Chet saw Kreiss follow. The scientist would have leaped to the side of the stricken man, whose body was so still now on the sunlit rock; but he, too, crumpled, then staggered back into the room. He pushed feebly at the port and swung it shut. His face, as he turned, was drawn into fearful lines.
"Acid!" He choked out the words between strangled breaths. "Acid--sulfuric--fumes!"
* * * * *
Chet turned quickly to the spectro-analyzer: the lines of oxygen and nitrogen were merged with others, and that meant an atmosphere unfit for human lungs! There had been a fumerole where yellowish vapor was spouting: he remembered it now.
"So!" boomed Schwartzmann, and now his squinting eyes were full on Chet. "You--you _schwein_! You said when we opened the ports there would be a surprise! Und this iss it! You thought to see us kill ourselves!
"Open that port!" he shouted. The men who held Chet released him and sprang forward to obey. The pilot, Max, took their place. He put one hand on Chet's shoulder, while his other hand brought up a threatening metal bar.
Schwartzmann's heavy face had lost its stolid look; it was alive with rage. He thrust his head forward to glare at the men, while he stood firmly, his feet far apart, two heavy fists on his hips. He whirled abruptly and caught Diane by one arm. He pulled her roughly to him and encircled the girl's trim figure with one huge arm.
"Put you _all_ on one island?" he shouted. "Did you think I would put you _all_ out of the ship? You"--he pointed at Harkness--"and you"--this time it was Chet--"go out now. You can die in your damned gas that you expected would kill me! But, you fools, you imbeciles--Mam'selle, she stays with me!" The struggling girl was helpless in the great arm that drew her close.
Harkness' mad rage gave place to a dead stillness. From bloodless lips in a chalk-white face he spat out one sentence:
"Take your filthy hands off her--now--or I'll--"
Schwartzmann's one free hand still held the pistol. He raised it with deadly deliberation; it came level with Harkness' unflinching eyes.
"Yes?" said Schwartzmann, "You will do--what?"
* * * * *
Chet saw the deadly tableau. He knew with a conviction that gripped his heart that here was the end. Walt would die and he would be next. Diane would be left defenseless.... The flashing thought that followed came to him as sharply as the crack of any pistol. It seemed to burst inside his brain, to lift him with some dynamic power of its own and project him into action.
He threw himself sideways from under the pilot's hand, out from beneath the heavy metal bar--and he whirled, as he leaped, to face the man. One lean, brown hand clenched to a fist that started a long swing from somewhere near his knees; it shot upward to crash beneath the pilot's outthrust jaw and lift him from the floor. Max had aimed the bar in a downward sweep where Chet's head had been the moment before; and now man and bar went down together. In the same instant Chet threw himself upon the weapon and leaped backward to his feet.
One frozen second, while, to Chet, the figures seemed as motionless as if carved from stone--two men beside the half-opened port--Harkness in convulsive writhing between two others--the figure of Diane, strained, tense and helpless in Schwartzmann's grasp--and Schwartzmann, whose aim had been disturbed, steadying the pistol deliberately upon Harkness--
"Wait!" Chet's voice tore through the confusion. He knew he must grip Schwartzmann's attention--hold that trigger finger that was tensed to send a detonite bullet on its way. "Wait, damn you! I'll answer your question. I'll tell you what we'll do!"
In that second he had swung the metal bar high; now he brought it crashing down in front of him. Schwartzmann flinched, half turned as if to fire at Chet, and saw the blow was not for him.
* * * * *
With a splintering crash, the bar went through an obstruction. There was sound of glass that slivered to a million mangled bits--the sharp tang of metal broken off--a crash and clatter--then silence, save for one bit of glass that fell belatedly to the floor, its tiny jingling crash ringing loud in the deathly stillness of the room....
It had been the control-room, this place of metal walls and of shining, polished instruments, and it could be called that no longer. For, battered to useless wreckage, there lay on a metal table a cage that had once been formed of curving bars. Among the fragments a metal ball that had guided the great ship still rocked idly from its fall, until it, too, was still.
It was a room where nothing moved--where no person so much as breathed....
Then came the Master Pilot's voice, and it was speaking with quiet finality.
"And that," he said, "is your answer. Our ship has made its last flight."
His eyes held steadily upon the blanched face of Herr Schwartzmann, whose limp arms released the body of Diane; the pistol hung weakly at the man's side. And the pilot's voice went on, so quiet, so hushed--so curiously toneless in that silent room.
"What was it that you said?--that Harkness and I would be staying here? Well, you were right when you said that, Schwartzmann: but it's a hard sentence, that--imprisonment for life."
Chet paused now, to smile deliberately, grimly at the dark face so bleached and bloodless, before he repeated:
"Imprisonment for life!--and you didn't know that you were sentencing yourself. For you're staying too, Schwartzmann, you contemptible, thieving dog! You're staying with us--here--on the Dark Moon!"
CHAPTER VI
"_Six to Four_"
Perhaps to every person in that control room there came, as Chet's quiet, emotionless tones died away, the same mental picture; for there was the same dazed look on the countenances of all.
They were seeing an ocean of space, an endless void of empty black. And across that etheric sea was a whirling globe. They had seen it from afar; they had seen its diminutive continents and its snow-clad poles.... They would never see it again....
Earth!--their own world!--home! And now for them it was only a moon, a tremendous, glorious moon, whose apparent nearness would be taunting and calling them each day and night of their lives....
It was Diane Delacouer who dared to break the hard silence that bound them all. From wide eyes she stared at Walt Harkness; then her lips formed a trembling smile in which Chet, too, was included.
"You saved us," she whispered; "you saved us, Chet ... but now it looks as if we all were exiles."
She crossed slowly, walking like one in a dream, to stand close to Walt Harkness. And Chet Bullard also roused himself; but it was toward the stupefied, hulking figure of Schwartzmann that he moved.
He reached for the detonite pistol, and this man who had been their captor was too stunned to
