Captain Carter appeared from his chart-room which stood in the center of the narrowing open deck space near the bow. I joined him at once.
“Who was that?” he half-whispered.
“Johnson.”
“Oh, yes.” He fumbled in his uniform; his gaze swept the moonlit deck. “Gregg–take this.” He handed me a small metal box. I stuffed it at once into my shirt.
“An insulator,” he added, swiftly. “Snap is in his office. Take it to him, Gregg. Stay with him–you’ll have a measure of security–and you can help him to make the photographs.” He was barely whispering. “I won’t be with you–no use making it look as though we were doing anything unusual. If your graphs show anything–or if Snap picks up any message–bring it to me.” He added aloud, “Well, it will be cool enough presently, Gregg.”
He sauntered away toward his chart-room.
“By heavens, what a relief!” Snap murmured as the current went on. We had wired his cubby with the insulator; within its barrage we could at last talk with a degree of freedom.
“You’ve seen George Prince, Gregg?”
“No. He’s assigned A 20. But I saw his sister. Snap, no one ever mentioned–”
Snap had heard of her, but he hadn’t known that she was listed for this voyage. “A real beauty, so I’ve heard. Accursed shame for a decent girl to have a brother like that.”
I could agree with him there, but I made no comment.
It was now 6 A. M. Snap had been busy all night with routine cosmo-radios from the earth, following our departure. He had a pile of them beside him. Many were for the passengers; but anything that savored of a code was barred.
“Nothing queer looking?” I suggested.
“No. Not a thing.”
We were at this time no more than some sixty-five thousand miles from the moon’s surface. The Planetara presently would swing upon her direct course for Mars. There was nothing which could cause passenger comment in this close passing of the moon; normally we used the satellite’s attraction to give us additional starting speed.
It was now or never that a message would come from Grantline. He was supposed to be upon this earthward side of the moon. While Snap had rushed through with his routine, I had searched the moon surface with our glass, as I knew Carter was searching it–and also the observer in his tower, very possibly.
But there was nothing. Copernicus and Kepler lay in full sunlight. The heights of the lunar mountains, the depths of the barren, empty seas were etched black and white, clear and clean. Grim, forbidding desolation, this unchanging moon! In romance, moonlight may shimmer and sparkle to light a lover’s smile; but the reality of the moon is cold and bleak. There was nothing to show my prying eyes where the intrepid Grantline might be.
“Nothing at all, Snap.”
And Snap’s helio mirrors, attuned for an hour now to pick up the faintest signal, were motionless.
“If he has concentrated any appreciable amount of radio-active ore,” said Snap, “we should get an impulse from its Gamma rays.”
But our receiving shield was dark, untouched. We tried taking hydrogen photographic impressions of the visible moon surface. A sequence of them, with stereoscopic lenses, forty-eight to the second. Our mirror-grid gave the magnified images; the spectro-heliograph, with its wave-length selection, pictured the mountain-levels, and slowly descended into the deepest seas.
There was nothing.
Yet in those moon caverns–a million million recesses amid the crags of that tumbled, barren surface–the pin-point of movement which might have been Grantline’s expedition could so easily be hiding! Could he have the ore insulated, fearing its Gamma rays would betray its presence to hostile watchers?
Or might disaster have come to him? Or he might not be upon this hemisphere of the moon at all…
My imagination, sharpened by fancy of a lurking menace which seemed everywhere about the Planetara this voyage, ran rife with fears for Johnny Grantline. He had promised to communicate this voyage. It was now, or perhaps never.
Six-thirty came and passed. We were well beyond the earth’s shadow now. The firmament blazed with its vivid glories; the sun behind us was a ball of yellow-red leaping flames. The earth hung, opened to a huge, dull-red half-sphere.
We were within some forty thousand miles of the moon. Giant white ball–all of its disc visible to the naked eye. It poised over the bow, and presently, as the Planetara swung upon her course for Mars, it shifted sidewise. The light of it glared white and dazzling in our tiny side windows.
Snap, with his habitual red celluloid eyeshade shoved high on his forehead, worked over our instruments.
“Gregg!”
The receiving shield was glowing a trifle! Gamma rays were bombarding it! It glowed, gleamed phosphorescent, and the audible recorder began sounding its tiny tinkling murmurs.
Gamma rays! Snap sprang to the dials. The direction and strength were soon obvious. A richly radio-active ore body, of considerable size, was concentrated upon this hemisphere of the moon! It was unmistakable.
“He’s got it, Gregg! He’s–”
The tiny helio mirrors began quivering. Snap exclaimed triumphantly, “Here he comes! By God, the message at last! Bar off that light!”
I flung on the absorbers. The moonlight bathing the little room went into them and darkness sprang around us. Snap fumbled at his instrument board. Actinic light showed dimly in the quivering, thumbnail mirrors. Two of them. They hung poised on their cobweb wires, infinitely sensitive to the infra-red light-rays Grantline was sending from the moon. The mirrors in a moment began swinging. On the scale across the room the actinic beams from them were magnified into sweeps of light.
The message!
Snap spelled it out, decoded it.
“Success! Stop for ore on your return voyage. Will give you our location later. Success beyond wildest hopes–”
The mirrors hung motionless. The shield, where the Gamma rays were bombarding, went suddenly dark.
Snap murmured, “That’s all. He’s got the ore! ‘Success beyond wildest hopes.’ That must mean an enormous quantity of it available!”
We were sitting in darkness, and abruptly I became aware that across our open window, where the insulation barrage was flung, the air was faintly hissing. An interference there! I saw a tiny swirl of purple sparks. Someone–some hostile ray from the deck beneath us, or from the spider bridge that led to our little room–someone out there trying to pry in!
Snap impulsively reached for the absorbers to let in the outside light–it was all darkness to us outside. But I checked him.
“Wait!” I cut off our barrage, opened our door and stepped to the narrow metal bridge.
“Wait, Snap! You stay there.” I added aloud, “Well, Snap, I’m going to bed. Glad you’ve cleaned up that batch of work.”
I banged the door upon him. The lacework of metal bridges and ladders
