Hal Clement - Mission of Gravity

In a fairly short time, numbers of the creatures were emerging from their homes with various articles which they apparently wished to trade, and other members of the Bree’s crew took active part in the bargaining. This continued as the sun swept across the sky and through the period of darkness — Barlennan asked Lackland to furnish illumination from the tank. If the artificial light bothered or surprised the giants at all, even Barlennan was unable to detect any signs of the fact. They paid perfect attention to the business at hand, and when one had gotten rid of what he had or acquired what he seemed to want, he would retire to his home and leave room for another. The natural result was that very few days passed before Barlennan’s remaining trade goods had changed hands, and the articles freshly acquired were being transferred to the roof of the tank.

Most of these things were as strange to Lackland as the original trade materials had been; but two attracted his attention particularly. Both were apparently living animals, though he could not make out their details too well because of their small size. Both appeared to be domesticated; each stayed crouched at the side of the sailor who had purchased it, and evinced no desire to move away. Lackland guessed — correctly, as it turned out — that these were creatures of the sort the sailors had been hoping to raise in order to test possible plant foods.

„Is that all the trading you’re going to do?” he called, as the last of the local inhabitants drifted away from the neighborhood of the tank.

„It’s all we can do,” replied Barlennan. „We have nothing more to trade. Have you any suggestions, or do you want to continue our journey now?”

„I’d like very much to find out what the interiors of those houses are like; but I couldn’t possibly get through the doors, even if I could discard my armor. Would you or any of your people be willing to try to get a look inside?” Barlennan was a trifle hesitant.

„I’m not sure whether it would be wise. These people traded peacefully enough, but there’s something about them that bothers me, though I can’t exactly put a nipper on it. Maybe it’s because they didn’t argue enough over prices.”

„You mean you don’t trust them — you think they’ll try to get back what they’ve given, now that you’re out of trade goods?”

„I wouldn’t say precisely that; as I said, I don’t have actual reason for my feeling. I’ll put it this way; if the tank gets back to the valley rim and hooked up to the ship so that we’re all ready to go, and we’ve had no trouble from these things in the meantime, I’ll come back down and take that look myself. Fair enough?”

Neither Barlennan nor Lackland had paid any attention to the natives during this conversation; but for the first time the city dwellers did not share this indifference. The nearer giants turned and eyed, with, every indication of curiosity, the small box from which Lackland’s voice was coming. As the talk went on, more and more of them drew near and listened; the spectacle of someone talking to a box too small, they knew, to contain any intelligent creature seemed, for the first time, to break down a wall of reserve that not even the tank had been able to affect. As Lackland’s final agreement to Barlennan’s suggestion came booming from the tiny speaker, and it became evident that the conversation was over, several of the listeners disappeared hastily into their homes and emerged almost at once with more objects. These they presented, with gestures which the sailors now understood quite well. The giants wanted the radio, and were willing to pay handsomely for it.

Barlennan’s refusal seemed to puzzle them. Each in turn offered a higher price than his predecessor. At last Barlennan made an ultimate refusal in the only way he could; he tossed the set onto the roof of the tank, leaped after it, and ordered his men to resume throwing the newly acquired property up to him. For several seconds the giants seemed nonplused; then, as though by signal, they turned away and disappeared into their narrow doorways.

Barlennan felt more uneasy than ever, and kept watch on as many portals as his eyes could cover while he stowed the newly bought goods; but it was not from the dwellings that the danger came. It was the great Hars who saw it, as he half reared himself over his fellows in imitation of the natives to toss a particularly bulky package up to his captain. His eye chanced to rove back up the channel they had descended; and as it did so he gave one of the incredibly loud hoots which never failed to amaze — and startle — Lackland. He followed the shriek with a burst of speech which meant nothing to the Earthman; but Barlennan understood, looked, and said enough in English to get the important part across.

„Charles! Look back uphill! Mover!

Lackland looked, and in the instant of looking understood completely the reason for the weird layout of the city. One of the giant boulders, fully half the size of the tank, had become dislodged from its position on the valley rim. It had been located just above the wide mouth of the channel down which the tank had come; the slowly rising walls were guiding it squarely along the path the vehicle had followed. It was still half a mile away and far above; but its downward speed was building up each instant as its tons of mass yielded to the tug of a gravity three times as strong as that of the Earth!

Flesh and blood have their limits as far as speed is concerned, but Lackland came very close to setting new ones. He did not stop to solve any differential equations which would tell him the rock’s time of arrival; he threw power into the motors, turned the tank ninety degrees in a distance that threatened to twist off one of its treads, and got out from the mouth of the channel which was guiding the huge projectile toward him. Only then did he really come to appreciate the architecture of the city. The channels did not come straight into the open space, as he had noticed; instead, they were so arranged that at least two could guide a rock across any portion of the plaza. His action was sufficient to dodge the first, but it had been forseen; and more rocks were already on their way. For a moment he looked around in all directions, in a futile search for a position which was not about to be traversed by one of the terrible projectiles; then he deliberately swung the nose of the tank into one of the channels and started uphill. There was a boulder descending this one too; a boulder which to Barlennan seemed the biggest of the lot — and to be growing bigger each second. The Mesklinite gathered himself for a leap, wondering if the Flyer had lost his senses; then a roar that outdid anything his own vocal apparatus could produce sounded beside him. If his nervous system had reacted like that of most Earthly animals he would have landed halfway up the hill. The startled reaction of his race, however, was to freeze motionless, so for the next few seconds it would have taken heavy machinery to get him off the tank roof. Four hundred yards away, fifty yards ahead of the plunging rock, a section of the channel erupted into flame and dust — the fuses on Lackland’s shells were sensitive enough to react instantly even to such grazing impact. An instant later the rock hurtled into the dust cloud, and the quick-firer roared again, this time emitting half a dozen barks that blended almost indistinguishably with each other. A fair half of the boulder emerged from the dust cloud, no longer even roughly spherical. The energy of the shells had stopped it almost completely; friction took care of the rest long before it reached the tank. It now had too many flat and concave surfaces to roll very well.

There were other boulders in position to roll down this channel, but they did not come. Apparently the giants were able to analyze a new situation with fair speed, and realized that this method was not going to destroy — the tank. Lackland had no means of knowing what else they might do, but the most obvious possibility was a direct personal attack. They could certainly, or almost certainly, get to the top of the tank as easily as Barlennan and repossess everything they had sold as well as the radio; it was hard to see how the sailors were to stop them. He put this thought to Barlennan.