That click, the dial beneath the counter, warned them that they were as cut off from the luxuriance outside as if they were viewing a scene on Mars or Sargol from their present position. To go beyond the shielding walls of the spacer into that riotous green world would sentence them to death as surely as if the Patrol was without, with a flamer trained on their hatch. There was no escape from that radiation—it would be in the air one breathed, strike though one's skin. And yet the wilderness flourished and beckoned.  
"Mutations—" Rip mused. "Space, Tau'd go wild if he could see it!"
 
And that mention of the Medic brought them back to the problem which had earthed them. Dane leaned back against the slanting wall of the cabin.
 
"We have to have a Medic—"
 
Rip nodded without looking away from the screen.
 
"Can one of the flitters be shielded?" The Cargo-apprentice persisted.
 
"That's a thought! Ali should know—" Rip reached for the inter-com mike. "Engines!"
 
"So you are alive?" Ali's voice had a bite in it. "About time you're contacting. Where are we? Besides being lopsided from a recruit's scrambled set-down, I mean."
 
"In the Big Burn. Come top-side. Wait—how's Weeks?"
 
"He has a devil's own headache, but he hasn't blacked out yet. Looks like his immunity holds in part. I've sent him bunkside for a while with a couple of pain pills. So we've made it—"
 
He must have left to join them for when Rip answered: "After a fashion," into the mike there was no reply.
 
And the clang of his boot plates on the ladder heralded his arrival at their post. There was an interval for him to view the outer world and accept the verdict of the counter and then Rip voiced Dane's question:
 
"Can we shield one of the flitters well enough to cross that? I can't take the Queen up and earth her again—"
 
"I know you can't!" the acting-engineer cut in. "Maybe you could get her off world, but you'll come close to blasting out when you try for another landing. Fuel doesn't go on forever—though some of you space jockeys seem to think it does. The flitter? Well, we've some spare rocket linings. But it's going to be a job and a half to get those beaten out and reassembled. And, frankly, the space whirly one who flies her had better be suited and praying loudly when he takes off. We can always try—" He was frowning, already busied with the problem which was one for his department.
 
So with intervals of snatched sleep, hurried meals and the time which must be given to tending their unconscious charges, Rip and Dane became only hands to be directed by Ali's brain and garnered knowledge. Weeks slept off the worst of his pain and, though he complained of weakness, he tottered back on duty to help.
 
The flitter—an air sled intended to hold three men and supplies for exploring trips on strange-worlds—was first stripped of all non-essentials until what remained was not much more than the pilot's seat and the motor. Then they labored to build up a shielding of the tough radiation dulling alloy which was used to line rocket tubes. And they could only praise the foresight of Stotz who carried such a full supply of spare parts and tools. It was a task over which they often despaired, and Ali improvised frantically, performing weird adjustments of engineering structure. He was still unsatisfied when they had done.
 
"She'll fly," he admitted. "And she's the best we can do. But it'll depend a lot on how far she has to go over 'hot' country. Which way do we head her?"
 
Rip had been busy with a map of Terra—a small thing he had discovered in one of the travel recordings carried for crew entertainment.
 
"The Big Burn covers three quarters of this continent. There's no use going north—the devastated area extends into the arctic regions. I'd say west—there's some fringe settlements on the sea coast and we need to contact a frontier territory. Now do we have it straight—? I take the flitter, get a Medic and bring him back?"
 
Dane cut in at that point. "Correct course! You stay here. If the Queen has to lift, you're the only one who can take her off world. And the same's true for Ali. I can't ride out a blast-off in either the pilot's or the engineer's seat. And Weeks is on the sick list. So I'm elected to do the Medic hunting—"
 
They were forced to agree to that. He was no hero, Dane thought, as he gave a last glance about his cabin early the next morning. The small cubby, utilitarian and bare as it was, never looked more inviting or secure. No, no hero, it was merely a matter of common sense. And although his imagination—that deeply hidden imagination with which few of his fellows credited him—shrank from the ordeal ahead, he had not the slightest intention of allowing that to deter him.
 
The space suit, which had been bulky and clumsy enough on the E-Stat asteroid under limited gravity, was almost twice as poorly adapted to progression on earth. But he climbed into it with Rip's aid, while Ali lashed a second suit under the seat—ready to encase the man Dane must bring back with him. Before he closed the helmet, Rip had one last order to give, along with an unexpected piece of equipment. And, when Dane saw that, he knew just how desperate Shannon considered their situation to be. For only on life or death terms would the Astrogator-apprentice have used Jellico's private key, opened the forbidden arms cabinet, and withdrawn that blaster.
 
"If you need it—use this—" Rip's face was very sober.
 
Ali arose from fastening the extra suit in place. "It's ready—"
 
He came back into the corridor and Dane clanked out in his place, settling himself behind the controls. When they saw him there, the inner hatch closed and he was alone in the bay.
 
With tantalizing slowness the outer wall of the spacer slid back. His hands blundering with the metallic claws of the gloves, Dane buckled two safety belts about him. Then the skeleton flitter moved to the left—out into the glare of the early day, a light too bright, even through the shielded viewplates of his helmet.
 
For some dangerous moments the machine creaked out and down on the landing cranes, the warning counter on its control panel going into a mad whirl of color as it tried to record the radiation. There came a jar as it touched the scorched earth at the foot of the Queen's fins.
 
Dane pressed the release and watched the lines whip up and the hatch above snap shut. Then he opened the controls. He used too much energy and shot into the air, tearing a wide gap through what was luckily a thin screen of the matted foliage, before he gained complete mastery.
 
Then he was able to level out and bore westward, the rising sun at his back, the sea of deadly green beneath him, and somewhere far ahead the faint promise of clean, radiation free land holding the help they needed.
 
Mile after mile of the green jungle swept under the flitter, and the flash of the counter's light continued to record a land unfit for mankind. Even with the equipment used on distant worlds to protect what spacemen had come to recognize was a reasonably tough human frame, no ground force could hope to explore that wilderness in person. And flying above it, as well insulated as he was, Dane knew that he could be dangerously exposed. If the contaminated territory extended more than a thousand miles, his danger was no longer problematical—it was an established fact.
 
He had only the vague directions from the scrap of map Rip had uncovered. To the west—he had no idea how far away—there stretched a length of coastline, far enough from the radiation blasted area to allow small settlements. For generations the population of Terra, decimated by the atomic wars, and then drained by first system and then Galactic exploration and colonization, had been decreasing. But within the past hundred years it was again on the upswing. Men retiring from space were returning to their native planet to live out their remaining years. The descendants of far-flung colonists, coming home on visits, found the sparsely populated mother world appealed to some basic instinct so that they remained. And now the settlements of mankind were on the march, spreading out from the well established sections which had not been blighted by ancient wars.
 
It was mid-afternoon when Dane noted that the green carpet beneath the flitter was displaying holes—that small breaks in the vegetation became sizable stretches of rocky waste. He kept one eye on the counter and what, when he left the spacer, had been an almost steady beam of warning light was now a well defined succession of blinks. The land below was cooling off—perhaps he had passed the worst of the journey. But in that passing how much had he and the flitter become contaminated? Ali had devised a method of protection for the empty suit the Medic would wear—had that held? There were an alarming number of dark ifs in the immediate future.
 
The mutant growths were now only thin patches of stunted and yellowish green. Had man penetrated only this far into the Burn, the knowledge of what lay beyond would be totally false. This effect of dreary waste might well discourage exploration.
 
Now the blink of the counter was deliberate, with whole seconds of pause between the flashes. Cooling off—? It was getting cold fast! He wished that he had a com-unit. Because of the interference in the Burn he had left it behind—but with one he might be able now to locate some settlement. All that remained was to find the seashore and, with it as a guide, flit south towards the center of mode............