Eighteen hundred feet of steel grid soared overhead. It made a criss-cross, ring-shaped wall more than a quarter mile high and almost to the top of the surrounding mountains. But the valley was not exactly a normal one. It was a crater, now: a steeply sloping, conical pit whose walls descended smoothly to the outer girders of the red painted, glistening steel structure. More girders for the completion of the grid projected from the sand just outside its circle. And in the landing-grid there was now a smaller, elaborate, truss-braced object. It rested on the rocky ground, unpainted and quite small. A hundred feet high, perhaps, and no more than three hundred across. But it was visibly a miniature of the great, newly-uncovered, repainted landing-grid which was qualified to handle interstellar cargo-ships and all the proper space-traffic of a minerals colony-planet.
A caterwheel truck came lurching and rolling and rumbling down the side of the pit. It had a sunshade and ground reflector wings, and Bordman slouched on a hobby-horse saddle in its back cargo section. He wore a heat-suit.
The truck reached the pit's bottom and bumped up to a tool-shed and stopped. Bordman got out, visibly cramped by the jolting, rocking, exhausting ride.
"Do you want to go in the shed and cool off?" asked Chuka.
"I'm all right," said Bordman. "I'm quite comfortable, so long as you feed me that expanded air." It was plain that he resented needing even a special air-supply. "What's all this about? Bringing the Warlock in? Why the insistence on my being here?"
"Ralph has a problem," said Chuka blandly. "He's up there—See? He needs you. There's a hoist. You've got to check degree-of-completion anyhow. You might take a look around while you're up there. But he's anxious for you to see something. There where you see the little knot of people. The platform."
Bordman grimaced. When one was well started on a survey, one got used to heights and depths and all sorts of environments. But he hadn't been up on steel work in a good many months. Not since a survey on Kalka IV nearly a year ago. He would be dizzy at first.
He accompanied Chuka to the spot where a steel cable dangled from an almost invisibly thin beam high above. There was a strictly improvised cage to ascend in—planks and a hand rail forming an insecure platform that might hold four people. He got into it, and Dr. Chuka got in beside him. Chuka waved his hand. The cage started up.
Bordman winced as the ground dropped away below. It was ghastly to be dangling in emptiness like this. He wanted to close his eyes. The cage went up and up. It took many long minutes to reach the top.
There was a newly-made platform there. The sunlight was blindingly bright, the landscape an intolerable glare. Bordman adjusted his goggles to maximum darkness and stepped gingerly from the swaying cage to the hardly more solid-seeming area. Here he was in mid-air on a platform barely ten feet square. It was rather more than twice the height of a metropolitan skyscraper from the ground. The mountain-crests were only half a mile away and not much higher. Bordman was acutely uncomfortable. He would get used to it, but—