lethal quills at anything that came too close. The ground gave no indication of opening up and swallowing them so they went outside, leaving Harrison ready to take off in a hurry should it decide to change its mind.
Nothing happened while they explored the crater and immediate surroundings, so they set up the portable drilling rig to take back some local samples of skin and underlying tissue. All scout ships carried these rigs and specimens had been taken from hundreds of areas all over the planet. But here the specimen was far from typical-they had to drill through nearly fifty feet of dry, fibrous skin before they came to the pink, spongy, underlying tissue. They transferred the rig to a position outside the crater and tried again. Here the skin was only twenty feet thick, the planetary average.
“This bothers me,” said Conway suddenly. “There was no oral cavity, no evidence of operating musculature, no sign of any kind of opening. It can’t be a mouth!”
“It wasn’t an eye it opened,” said Harrison on the suit frequency. “I was there … here, I mean.”
“It looks just like scar tissue,” said Conway. “But it’s too deep to have been formed only as a result of burning by Descartes’ tail flare. And why did it just happen to have a mouth here anyway, just where the ship decided to land? The chances against that happening are millions to one. And why haven’t other mouths been discovered inland? We’ve surveyed every square mile of the land mass, but the only surface mouth to appear was a few minutes after Descartes landed. Why?”
“It saw us coming and …” began Harrison.
“What with?” said Edwards.
… Or fit us land, then, and decided to form a mouth …
“A mouth,” said Conway, “with muscles to open and close it, with teeth, predigestive juices and an alimentary canal joining it to a stomach which, unless it decided to form that as well, could be many miles away- all within a few minutes of the ship landing? From what we know of carpet metabolism I can’t see all that happening so quickly, can you?”
Edwards and Harrison were silent.
“From our study of the carpet inhabiting that small island to the north,” said Conway, “we have a fair idea of how they function.”
Since the day after their arrival the island had been kept under constant observation. Its inhabitant had an incredibly slow, almost vegetable, metabolism. The carpet’s upper surface appeared not to move, but it did in fact alter its contours so as to provide a supply of rainwater wherever needed for the plant life which recycled its air and wastes or served as an additional food supply. The only real activity occurred around the fringes of the carpet, where the great being had its mouths. But here again it was not the carpet itself which moved quickly but the hordes of predators who tried to eat it while it slowly and ponderously ate them in with the thick, food-rich sea water. The other big carpets unlucky enough not to have a fringe adjoining the sea ate vegetation and each other.
The carpets did not possess hands or tentacles or manipulatory appendages of any kind-just mouths and eyes capable of tracking an arriving spaceship.
“Eyes?” said Edwards. “Why didn’t they see our scout ship?”
“There have been dozens of scout ships and copters flitting about recently,” said Conway, “and the beast may be confused. But what I’d like you to do now, Lieutenant, is take your ship up to, say, one thousand feet and do a series of figure-eight turns. Do them as tightly and quickly as possible, cover the same area of ground each time and make the crossover point directly above our heads. Got it?”
“Yes, but …
“This will let the beastie know that we aren’t just any scout ship but a very special one,” Conway explained, then added, “be ready to pick us up in a hurry if something goes wrong.
A few minutes later Harrison took off, leaving the two doctors standing beside their drilling rig. Edwards said, “I see what you mean, Doctor. You want to attract attention to us. ‘X’ marks the spot and an 'X' with closed ends is a figure-eight. Persistency of vision will do the rest.”
The scout ship was criss-crossing above them in the tightest turns Conway had ever seen. Even with the ship’s gravity compensators working at full capacity Harrison must have been taking at least four Gs. On the ground the ship’s shadow whipped past and around them, trailing a long, bright yellow line of rolled-up leaves. The ground shook to the thunder of the tiny vessel’s jet and then, very slightly, it began shaking by itself.
“Harrison!”
The scout ship broke off the maneuver and roared into a landing behind them. By then the ground was already beginning to sag.
Suddenly they appeared.
Two large, flat metal disks embedded vertically in the ground, one about twenty feet in front of them and the other the same distance behind. As they watched each disk contracted suddenly into a shapeless blob of metal which crawled a few feet to the side and then suddenly became a large, razor-edged disk again, cutting a deep incision in the ground. The disks had each cut more than a quarter circle around them and the ground was sagging rapidly inside the incisions before Conway realized what was happening.
“Think cubes at them!” he yelled. “Think something blunt! Harrison!”
“Lock’s open. Come running.”
But they could not run without taking their eyes and minds off the disks, and if they did that they could not run fast enough to clear the circular incision which was being made around them. Instead they sidled toward the scout ship, willing every inch of the way that the disks become cubes or spheres or horseshoes-anything but the great, circular scalpels which something had made them become.
At Sector General Conway had watched his colleague Mannon perform incredible feats of surgery, using one of these thought-controlled tools, an all-purpose surgical instrument which became anything he wanted it to be instantly. Now two of the things were crawling and twisting like metallic nightmares as they tried to shape them one way and something else-which was their owner and as such had more expertise-tried to shape them another. It was a very one-sided struggle but they did, just barely, manage to hamper their opponent’s thinking enough to allow them to get clear before the circular plug of “skin” containing the drilling rig and other odds and ends of equipment dropped from sight.
“They’re welcome to it,” said Major Edwards as the lock slammed shut and Harrison lifted off. “After all, we’ve been taking specimens for weeks and it may give them something to think about before we broaden contact with shadow diagrams.” He grew suddenly excited as he went on, “With high-acceleration radio-controlled missiles we can build up quite complex figures!”
Conway said, “I was thinking more in terms of a tight beam of light projected onto the surface at night. The leaves should react by opening and the beam could be moved very quickly in a rectangular sweep pattern like old- fashioned TV. It might even be possible to project moving pictures.”
“That’s it,” said Edwards enthusiastically. “But how a dirty great beast the size of a county, who doesn’t have arms, legs or anything else, will be able to answer our signals is another matter. Probably it will think of something.”
Conway shook his head. “It is possible that despite their slow movements the carpets are capable of quick thinking, that they are in fact the tool users we are looking for and that their enormous bodies undergo voluntary surgery whenever they want to draw in and examine a specimen which is not within reach of a mouth. But I prefer the theory of a smaller, intelligent life-form inside or under the big one, an intelligent parasite perhaps which helps maintain the host in good health by the use of the tools and other abilities, and which makes use of the host being’s 'eyes’ as well as everything else. You can take your pick.”
There was silence while the scout ship leveled off on a course which would take it back to the mother ship, then Harrison said, “We haven’t made direct contact, then-we’ve just put squiggles on a vegetable radar screen? But it is still a big step forward.”
“As I see it,” said Conway, “if tools were being used to bring us to them, they must be a fair distance from the surface-perhaps they can’t exist on the surface. And don’t forget they would use the carpet exactly as we use vegetable and mineral resources. How would they analyze life samples? Would they be able to see them at all down there? They use plants for eyes but I can’t imagine a vegetable microscope. Perhaps they would use the big beastie’s digestive juices in certain stages of the analysis.
Harrison was beginning to look a little green around the gills. He said, “Let’s send down a robot sensor first,
