This is the fourth installment of "Terrors Unseen", a 1931 science fiction story by Harl Vincent, a prolific writers of the 1930s who has since fallen into obscurity. Since the story is now in the public domain, I have taken it upon myself to reprint it here on my blog, so that it will not be lost to posterity when the last copy of the March 1931 issue of Astounding Stories crumbles into dust. The first three installments of the story can be found here, here, and here. And now, on with the show . . .
* * *
It was a fruitless chase and Eddie soon retraced his steps to the laboratory. Swell mess he'd gotten himself into! His car was gone: probably wrapped around a tree by this time. And here was a situation that spelled real danger, a thing with which Shelton was utterly unable to cope. As a matter of fact, he was so impractical -- such a visionary cuss, after the fashioin of all geniuses -- that he'd never be convinced of the seriousness of the matter until it was too late. What to do? The girl was a corker, though, and game as they made 'em. Just the sort a fellow could tie to . . . .
Lina's firm clear voice came to him through the open door of the laboratory. "Dad," she was saying, "why don't you give it up? Let's go back to New York where it is safe for you and for me. Let the things go and forget about them. What do they amount to, after all? We've plenty of money and you alredy have earned enough fame to last the rest of your life. Come on now -- please -- for me."
"What do they amount to?" Shelton reiterated, his voice rising querulously. "Lina, it's the most tremendous thing I've ever done. Think for a moment of what my robots could accomplish in the next war. And there'll be a next war as sure as you're alive. Think of it! No sending of our young manhood into the bloody fields of battle; no manning of our air fleets with the cream of our youth; no bloodshed on our side whatsoever. Instead, these robots will fight the war. They'll fight other robots too, no doubt, but the property of invisibility will be an invincible weapon. It will be a war that will end war once and for all. You can't --"
"Nonsense, father," the girl returned sharply. "You've let your enthusiasm run away with your judgment. See what's happened already? -- someone's figured it out before you've even perfected the thing. An enemy of our country could do the same in wartime. Maybe it's a foreign spy who has done what's been done to-day."
* * *
Eddie walked into the laboratory. "Couldn't find him," he announced briefly.
"No difference," said Shelton. "He doesn't count in this. We called to you when you rushed out, but couldn't make you hear."
"Who is he?" Eddie asked shortly. What he had overheard made him more than ever impatient with the older man. So clever and yet so dense, Shelton was.
Lina avoided his gaze.
"Only Carlos -- Carlos Savarino," said Shelton, carelessly, "a Chilean, I think. He worked for me for two months during the summer and I fired him for getting fresh with Lina. Good mechanic, but dumb as an ox. Had to tell him every little detail when he was doing something in the shop. I'd have saved time if I'd done it myself."
The girl looked at Eddie squarely now. She was flushing hotly. "And I horsewhipped him," she added.
"Yes," Shelton laughed; "it was rich. He sneaked away like a whipped puppy, and this is the first time we've seen him since."
Eddie whistled. "And you think he doesn't count in this?" he asked.
"Of course not. Too dumb, I tell you. Doesn't know the first principles of science. He thinks the only wave motion is that of the ocean." Shelton chuckled over his own jest.
"I wouldn't be too sure," Eddie snapped. "And I want to tell you something, Mr. Shelton. Through no fault of my own, I heard some of your conversation with Li -- with your daughter, before I returned here. I was puzzled over your reasons for working so absorbedly on this thing, but now I know them and I think you're wasting your time and keeping your duaghter in needless danger."
"You dare talk to me like this!" Shelton roared.
"I do, sir, and you'll thank me later," Eddie returned the older man's glare with one equally savage.
Lina's gurgle of laughter broke the tension. "He's right, Dad, and you know it," she interposed. "Let him finish."
Eddie needed no such encouragement, though it warmed his heart. And Shelton listened respectfully when he continued, "I'm into this now, sir, and I intend to see it through to the end. I'll keep your secret, too, though I doubt if it'll ever be of much value to you. Know what I think? I think this Carlos is a damn clever fellow instead of the ass you took him to be. He probably just pretended he was ignorant of science. Why shouldn't he? That way he got a liberal education from you in the very things he wated to find out. Since you tied the can to him he's had plenty of chances to build a duplicate of your control apparatus -- with the aid of some foreign government, no doubt -- and now they've stolen two of your machines to complete the job. Your secret already is out and in the very hands you've tried to keep it from."
* * *
Shelton paled visibly as Eddie talked. "But -- but how --" he stammered.
"How should I know how they did it?' the younger man countered. "Here -- let's take a look around. I'll bet they've left their trail right here in this room."
He walked from one end of the laboratory to the other, peering into corners and under work benches as he passed. Shelton trailed him like a shadow, squinting through the square lenses of his spectacles.
They carefully avoided the partially invisible robot, for the humming of its upper motors continued and clanking sounds occasionally issued from the unseen upper portion. The enemies of David Shelton were still at work on their hidden controls.
"Here -- what's this?" Eddie exclaimed suddenly, pointing out a glinting object in a dark corner of the laboratory.
Shelton examined it closely, looking over his shoulder. The object he had located seemed to be a mounted and hooded lens, a highly polished glass of about two inches diameter with its mounting attached rigidly to the wall.
"Never saw that before," Shelton stated with conviction. "And -- why -- it looks like an objective such as those used in the latest automatic television transmitters."
"Just what it is," Eddie grunted. He picked up a pinch bar from a nearby tool rack and drove its end through the glass as he spoke the words.
A violent wrench tore the thing loose and broke away a section of the thin plastered wall. There, in the cleverly concealed cavity behind, was revealed the mechanism of the radio "eye." Somewhere, someone had been watching their every move. And abruptly the thrashings of the robot ceased and its upper portion again became visible.
(continue on to Part 5)