„Well — I’m not sure. Every now and then I let myself in for something just because it looks interesting; but I’m much happier in the end if I make something out of it.”
„Then please concentrate on what you’re making out of this trip. If it will help you any to do that, we’ll collect a hundred or a thousand shiploads of those spices you just got rid of and store them for you where the Bree wintered; it would still pay us, if you’ll get that information we need.”
„Thanks, I expect to make profit enough. You’d take all the fun out of life.”
„I was afraid you’d feel that way. All right, I can’t order you around, but please remember what this means to us.”
Barlennan agreed, more or less sincerely, and swung his ship once more southward. For some days the island they had left was visible behind them, and often they had to change course to avoid others. Several times they saw gliders skimming the waves on the way from one island to another, but these always gave the ship a wide berth. Evidently news spread rapidly among these people. Eventually the last visible bit of land slipped below the horizon, and the human beings said that there was no more ahead — good fixes could once more be obtained with the weather in its present clear state.
At about forty-gravity latitude they directed the ship on a more southeasterly course to avoid the land mass which, as Reejaaren had said, swung far to the east ahead of her. Actually the ship was following a relatively narrow passage between two major seas, but the strait was far too wide for that fact to be noticeable from shipboard.
One minor accident occurred some distance into the new sea. At around sixty gravities the canoe, still following faithfully at the end of its towrope, began to settle visibly in the sea. While Dondragmer put on his best „I told you so” expression and remained silent, the little vessel was pulled up to the ship’s stern and examined. There was quite a bit of methane in the bottom, but when she was unloaded and pulled aboard for examination no leak was visible. Barlennan concluded that spray was responsible, though the liquid was much clearer than the ocean itself. He put the canoe back in. the sea and replaced its load, but detailed a sailor to inspect every few days and bail when necessary. This proved adequate for many days; the canoe floated as high as ever when freshly emptied, but the rate of leakage grew constantly greater. Twice more she was pulled aboard for inspection without result; Lackland, consulted by radio, could offer no explanation. He suggested that the wood might be porous, but in that case the leaking should have been present from the beginning.
The situation reached a climax at about two hundred gravities, with more than a third of the sea journey behind them. The minutes of daylight were longer now as spring progressed and the Bree moved ever farther from her sun, and the sailors were relaxing accordingly. The individual who had the bailing job was not, therefore, very attentive as he pulled the canoe up the stern rafts and climbed over its gunwale. He was aroused immediately thereafter. The canoe, of course, settled a trifle as he entered; and as it did so, the springy wood of the sides gave a little. As the sides collapsed, it sank a little farther — and the sides yielded more — and it sank yet farther-Like any feedback reaction, this one went to completion in a remarkably short time. The sailor barely had time to feel the side of the canoe pressing inward when the whole vessel went under and the outside pressure was relieved. Enough of the cargo was denser than methane to keep the canoe sinking, and the sailor found himself swimming where he had expected to be riding. The canoe itself settled to the end of its towrope, slowing the Bree with a jerk that brought the entire crew to full alertness.
The sailor climbed back into the Bree, explaining what had happened as he did so. All the crew whose duties did not keep them elsewhere rushed to the stern, and presently the rope was hauled in with the swamped canoe at the end of it. With some effort, the canoe and such of its load as had been adequately lashed down were hauled aboard, and one of the sets turned to view it. The object was not very informative; the tremendous resilience of the wood had resulted in its recovering completely even from this flattening, and the canoe had resumed its original shape, still without leaks. This last fact was established after it had once more been unloaded.
Lackland, looking it over, shook his head and offered no explanation. „Tell me just what happened — what everyone who saw anything at all did see.”
The Mesklinites complied, Barlennan translating the stories of the crewman who had been involved and the few others who had seen the event in any detail. It was the first, of course, that provided the important bit of information.
„Good Earth!” Lacklaiid muttered, half aloud. „What’s the use of a high school education if you can’t recall it when needed later on? Pressure in a liquid corresponds to the weight of liquid above the point in question — and even methane under a couple of hundred gravities weighs a good deal per vertical inch. That wood’s not much thicker than paper, either; a wonder it held so long.” Barlennan interrupted this rather uninformative monologue with a request — for information.
„I gather you now know what happened,” he said. „Could you please make it clear to us?”
Lackland made an honest effort, but was only partly successful. The concept of pressure, in a quantitative sense, defeats a certain number of students in every high school class.
Barlennan did get the idea that the deeper one went into the sea the greater was the crushing force, and that the rate of increase with depth went up along with gravity; but he did not connect this force with others such as wind, or even the distress he himself had experienced when he submerged too rapidly in swimming.
The main point, of course, was that any floating object had to have some part of itself under the surface, and that sooner or later that part was going to be crushed if it was hollow. He avoided Dondragmer’s eye as this conclusion was reached in his conversation with Lackland, and was not comforted when the mate pointed out that this was undoubtedly where he had betrayed his falsehood when talking to Reejaaren. Hollow ships used by his own people, indeed! The islanders must have learned the futility of that in the far south long since.
The gear that had been in the canoe was stowed on deck, and the voyage continued. Barlennan could not bring himself to part with the now useless little vessel, though it took up a good deal of space. He disguised its uselessness thinly by packing it with food supplies which could not have been heaped so high without the sides of the canoe to retain them. Dondragmer pointed out that it was reducing the ship’s flexibility by extending the length of two rafts, but the captain did not let this fact worry him.
Time passed, as it had before, first hundreds and then thousands of days. To the Mesklinites, long-lived by nature, its passage meant little; to the Earthmen the voyage gradually became a thing of boredom, part of the regular routine of life. They watched and talked to the captain as the line on the globe slowly lengthened; measured and computed to determine his position and best course when he asked them to; taught English to or tried to learn a Mesklinite language from sailors who sometimes also grew bored; in short, waited, worked where possible, and killed time as four Earthly months — nine thousand four hundred and some odd Mesklinite days — passed. Gravity increased from the hundred and ninety or so at the latitude where the canoe had sunk to four hundred, and then to six, and then further, as indicated by the wooden spring balance that was the Bree’s latitude gauge. The days grew longer and the nights shorter until at last the sun rode completely around the sky without touching the horizon, though it dipped toward it in the south. The sun itself seemed shrunken to the men who had grown used to it during the brief time of Mesklin’s perihelion passage. The horizon, seen from the Bree’s deck through the vision sets, was above the ship all around, as Barlennan had so patiently explained to Lackland months before; and he listened tolerantly when the men assured him it was an optical illusion. The land that finally appeared ahead was obviously above them too; how could an illusion turn out to be correct? The land was really there. This was proved when they reached it; for reach it they did, at the mouth of a vast bay that stretched on to the south for some two thousand miles, half the remaining distance to the grounded rocket. Up the bay they sailed, more slowly as it finally narrowed to the dimensions of a regular estuary and they had to tack instead of seeking favorable winds with the Flyer’s help, and finally to the river at its head. Up this they went too, no longer sailing except at rare, favorable intervals; for the current against the blunt faces of the rafts was more than the sails could usually overcome, broad as the river still was. They towed instead, a watch at a time going ashore with ropes and pulling; for in this gravity even a single Mesklinite had a respectable amount of traction. More weeks, while the. Earthmen lost their boredom and tension mounted in the Toorey station. The goal was almost in sight, and hopes ran high.
And they were dashed, as they had been for a moment months before when Lackland’s tank reached the end of its journey. The reason was much the same; but this time the Bree and its crew were at the bottom of a cliff, not the top. The cliff itself was three hundred feet high, not sixty; and in nearly seven hundred gravities climbing, jumping and other rapid means of travel which had been so freely indulged at the distant Rim were utter impossibilities for the powerful little monsters who manned the ship.
The rocket was fifty miles away in horizontal distance; in vertical, it was the equivalent, fot a human being, of a climb of nearly thirty-five — up a sheer rock wall.
XV: HIGH GROUND
The change of mind that had so affected the Bree’s crew was not temporary; the unreasoning, conditioned fear of height that had grown with them from birth was gone. They Still, however, had normal reasoning power; and in this part of their planet a fall of as much as half a body’s length was nearly certain to be fatal even to their tough organisms. Changed as they were, most of them felt uneasy as they moored the Bree to the riverbank only a few rods from the towering cliff that barred them from the grounded rocket.
The Earthmen, watching in silence, tried futilely to think of a way up the barrier. No rocket that the expedition possessed could have lifted itself against even a fraction of Mesklin’s polar gravity; the only one that had ever been built able to do so was already aground on the planet. Even had the craft been capable, no human or qualified non-human pilot could have lived in the neighborhood; the only beings able to do that could no more be taught to fly a rocket than a Bushman snatched straight from the jungle.
„The journey simply isn’t as nearly over as we thought.” Rosten, called to the screen room, analyzed the situation rapidly. „There should be some way to the plateau or farther slope whichever is present — of that cliff. I’ll admit there seems to be no way Barlennan and his people can get up; but there seems to be nothing preventing their going around.” Lackland relayed this suggestion to the captain.
„That is true,” the Mesklinite replied. „There are, however, a number of difficulties. It is already getting harder to procure food from the river; we are very far from the sea. Also, we have no longer any idea of how far we may have to travel, and that makes planning for food and all other considerations nearly impossible. Have you prepared, or can you prepare, maps with sufficient detail to let us plan our course intelligently?”
„Good point. I’ll see what can be done.” Lackland turned from the microphone to encounter several worried frowns. „What’s the matter? Can’t we make a photographic map as we did of the equatorial regions?”
„Certainly,” Rosten replied. „A map can be made, possibly with a lot of detail; — but it’s going to be difficult. At the equator a rocket could hold above a given point, at circular velocity, only six hundred miles from the surface — right at the inner edge of the ring. Here circular velocity won’t be enough, even if we could use it conveniently. We’d have to use a hyperbolic orbit of some sort to get short-range pictures without impossible fuel consumption; and that would mean speeds relative to the surface of several hundred miles a second. You can see what sort of pictures that would mean. It looks as though the shots will have to be taken with long-focus lenses, at extremely long range; and we can only hope that the detail will suffice for Barlennan’s needs.”
„I hadn’t thought of that,” admitted Lackland. „We can do it, though; and I don’t see any ‘alternative in any case. I suppose Barlennan could explore blind, but it would be asking a lot of him.”
„Right. Well launch one of the rockets and get to work.” Lackland gave the substance of this conversation to Barlennan, who replied that he would stay where he was until the information he needed was obtained.
„I could either go on upstream, following the cliff around to the right, or leave the ship and the river and follow to the left. Since I don’t know which is best from the point of view of distance, well wait. I’d rather go upstream, of course; carrying food and radios will be no joke otherwise.”
„All right. How is your food situation? You said something about its being hard to get that far from the ocean.”
„It’s scarcer, but the place is no desert. We’ll get along for a time at least. If we ever have to go overland we may miss you and your gun, though. This crossbow has been nothing but a museum piece for nine tenths of the trip.” „Why do you keep the bow?”
„For just that reason — it’s a good museum piece, and museums pay good prices. No one at home has ever seen, or as far as I know even dreamed of, a weapon that works by throwing things. You couldn’t spare one of your guns, could you? It needn’t work, for’that purpose.”
Lackland laughed. „I’m afraid* not; we have only one. We don’t expect to need it, but I don’t see how we could explain giving it away.” Barlennjui gave the equivalent of an understanding nod, and turned back to his own duties. He had much to bring up to date on the bowl that was his equivalent of a globe; the Earthmen, throughout the trip, had been giving him bearing and distance to land in all directions, so he was able to get most of the shores of the two seas he had crossed onto the concave map.
