While not artificial, the Hill had been altered markedly by the engineers who had built into it the headquarters of the Triplanetary Service. Its mile-wide top was a jointless expanse of gray armor steel; the steep, smooth surface of the truncated cone was a continuation of the same immensely thick sheet of metal. No known vehicle could climb that smooth, hard, forbidding slope of steel; no known projectile could mar that armor; no known craft could even approach the Hill without detection. Could not approach it at all, in fact, for it was constantly inclosed in a vast hemisphere of lambent violet flame through which neither material substance nor destructive ray could pass.
As the Silver Sliver, crawling along at a bare five hundred miles an hour, approached that transparent, brilliantly violet wall of destruction, a light of the same color filled her control room and as suddenly went out; flashing on and off again and again.
"Giving us the once-over, eh?" Cleveland asked. "That's something new, isn't it?"
"Yes, it's a high-powered ultra-wave spy," Rodebush returned. "The light is simply a warning, which can be carried if desired. It can also carry voice and vision...."
"Like this," Samms' voice interrupted from a speaker upon the pilot's panel and his clear-cut face appeared upon the television screen. "I don't suppose Fred thought to mention it, but this is one of his inventions of the last few days. We are just trying it out on you. It doesn't mean a thing though, as far as the Sliver is concerned. Come ahead!"
A circular opening appeared on the wall of force, an opening which disappeared as soon as the plane had darted through it; and at the same time her landing-cradle rose into the air through a great trap-door. Slowly and gracefully the space-plane settled downward into that cushioned embrace. Then cradle and nestled Sliver sank from view and, turning smoothly upon mighty trunnions, the plug of armor drove solidly back into its place in the metal pavement of the mountain's lofty summit. The cradle-elevator dropped rapidly, coming to rest many levels down in the heart of the Hill, and Cleveland and Rodebush leaped lightly out of their transport, through her still hot outer walls. A door opened before them and they found themselves in a large room of unshadowed daylight illumination; the office of the Chief of the Triplanetary Service. Calmly efficient executives sat at their desks, concentrating upon problems or at ease, according to the demands of the moment; agents, secretaries, and clerks, men and women, went about their wonted tasks; televisotypes and recorders flashed busily but silently—each person and machine an integral part of the Service which for so many years had been carrying an ever-increasing share of the load of governing the three planets.
"Right of way, Norma?" Rodebush paused before the desk of Virgil Samms' private secretary. She pressed a button and the door behind her swung wide.
"You two do not need to be announced," the attractive young woman smiled. "Go right in."
Samms met them at the door eagerly, shaking hands particularly vigorously with Cleveland.
"Congratulations on that camera, Lyman!" he exclaimed. "You did a wonderful piece of work on that. Help yourselves to smokes and sit down—there are a lot of things we want to talk over. Your pictures carried most of the story, but they would have left us pretty much at sea without Costigan's reports. But as it was, Fred here and his crew worked out most of the answers from the dope the two of you got; and what few they haven't got yet they soon will have."
"Nothing new on Conway?" Cleveland was almost afraid to ask the question.
"No." A shadow came over Samms' face. "I'm afraid ... but I'm hoping it's only that those creatures, whatever they are, have taken him so far away he can't reach us."
"They certainly are so far away that we can't reach them," Rodebush volunteered. "We can't even get their ultra-wave interference any more."
"Yes, that's a hopeful sign," Samms went on. "I hate to think of Conway Costigan checking out. There, fellows, was a real observer. He was the only man I have ever known who combined the two qualities of the perfect witness. He could actually see everything he looked at, and could report it truly, to the last, least detail. Take all this stuff, for instance; especially their ability to transform iron into a fluid allotrope, and in that form to use its atomic—nuclear?—energy as power. Something brand new, and yet he described their converters and projectors so minutely that Fred was able to work out the underlying theory in three days, and to tie it in with our own super-ship. My first thought was that we'd have to rebuild it iron-free, but Fred showed me my error—you found it first yourself, of course."
"It wouldn't do any good to make the ship non-ferrous unless you could so change our blood chemistry that we could get along without hemoglobin, and that would be quite a feat," Cleveland agreed. "Then, too, our most vital electrical machinery is built around iron cores. We'll also have to develop a screen for those forces—screens, rather, so powerful that they can't drive anything through them."
"We've been working along those lines ever since you reported," Rodebush said, "and we're beginning to see light. And in that same connection it's no wonder that we couldn't handle our super-ship. We had some good ideas, but they were wrongly applied. However, things look quite promising now. We have the transformation of iron all worked out in theory, and as soon as we get a generator going we can straighten out everything else in short order. And think what that unlimited power means! All the power we want—power enough even to try out such hitherto purely theoretical possibilities as the neutralization of the inertia of matter!"
"Hold on!" protested Samms. "You certainly can't do that! Inertia is—must be—a basic attribute of matter, and surely cannot be done away with without destroying the matter itself. Don't start anything like that, Fred—I don't want to lose you and Lyman, too."
"Don't worry about us, Chief," Rodebush replied with a smile. "If you will tell me what matter is, fundamentally, I may agree with you.... No? Well, then, don't be surprised at anything that happens. We are going to do a lot of things that nobody on the Three Planets ever thought of doing before."
Thus for a long time the argument and discussion went on, to be interrupted by the voice of the secretary.
"Sorry to disturb you, Mr. Samms, but some things have come up that you will have to handle. Knobos is calling from Mars. He has caught the Endymion, and has killed about half her crew doing it. Milton has finally reported from Venus, after being out of touch for five days. He trailed the Wintons into Thalleron swamp. They crashed him there, and he won out and has what he went after. And just now I got a flash from Fletcher, in the asteroid belt. I think that he has finally traced that dope line. But Knobos is on now—what do you want him to do about the Endymion?"
"Tell him to—no, put him on here, I'd better tell him myself," Samms directed, and his face hardened in ruthless decision as the horny, misshapen face of the Martian lieutenant appeared upon the screen. "What do you think, Knobos? Shall they come to trial or not?"
"Not."
"I don't think so, either. It is better that a few gangsters should disappear in space than that the Patrol should have to put down another uprising. See to it."
"Right." The screen darkened and Samms spoke to his secretary. "Put Milton and Fletcher on whenever they come in." He turned to his guests. "We've covered the ground quite thoroughly. Goodbye—I wish I could go with you, but I'll be pretty well tied up for the next week or two."
"'Tied up' doesn't half express it," Rodebush remarked as the two scientists walked along a corridor toward an elevator. "He probably is the busiest man on three planets."
"As well as the most powerful," Cleveland supplemented. "And very few men could use his power as fairly—but he's welcome to it, as far as I'm concerned. I'd have the pink fantods for a month if I had to do only once what he's just done—and to him it's just part of a day's work."
"You mean the Endymion? What else could he do?"
"Nothing—that's the hell of it. It had to be done,