by Bob Shaw
Lain had already completed the entire journey in his mind, Toller realised, and everything he had predicted would come to pass. Truly, they were entering a region of strangeness, but the intellects of Lain Maraquine and other men like him had already marked the way, and they had to be trusted.…
“Don’t get so excited that you lose the burn rhythm,” Toller said calmly, turning to Zavotle. “And don’t forget to check the height gauge readings by measuring the apparent diameter of Land four times a day.”
He directed his gaze at Rillomyner and Flenn. “And as for you two — why did the Squadron take the trouble to send you to special classes? The spring has not altered in strength. We’re getting lighter as we get higher, and I will treat any disputing of that fact as insubordination. Is that clear?”
“Yes, captain.”
Both men spoke in unison, but Toller noticed a troubled look in Rillomyner’s eyes, and he wondered if the mechanic was going to have difficulty in adjusting to his increasing weightlessness. This is what the proving flight is for, he reminded himself. We are testing ourselves as much as the ship. By nightfall the weight on the height gauge had risen to near the halfway mark on the scale, and the effects of reduced gravity were apparent, no longer a matter for argument.
When a small object was allowed to drop it fell to the floor of the gondola with evident slowness, and all members of the crew reported curious sinking sensations in their stomachs. On two occasions Rillomyner awoke from sleep with a panicky shout, explaining afterwards that he had been convinced he was falling.
Toller noticed the dreamlike ease with which he could move about, and it came to him that it would soon be advisable for the crew to remain tethered at all times. The idea of an unnecessarily vigorous movement separating a man from the ship was one he did not like to contemplate.
He also observed that, in spite of its decreased weight, the ship was tending to rise more slowly. The effect had been accurately predicted — a result of the fading weight differential between the hot gas inside the envelope and the surrounding atmosphere. To maintain speed he altered the burn rhythm to four-eighteen, and then to four-sixteen. The pikon and halvell hoppers on the burner were being replenished with increasing frequency and, although there were ample reserves, Toller began to look forward to reaching the altitude of thirteen-hundred miles. At that point the ship’s weight, decreasing by squares, would be only a fourth of normal, and it would become more economical to change over to jet power until the zone of zero gravity had been passed.
The need to interpret every action and event in the dry languages of mathematics, engineering and science conflicted with Toller’s natural response to his new environment. He found he could spend long periods leaning on the rim of the gondola, not moving a muscle, mesmerised, all physical energies annulled by pure awe. Overland was directly above him, but screened from view by the patient, untiring vastness of the balloon; and far below was the home world, gradually becoming a place of mystery as its familiar features were blurred by a thousand miles of intervening air.
By the third day of the ascent the sky, although retaining its normal coloration above and below, was shading on all sides of the ship into a deeper blue which glistered with ever-increasing numbers of stars.
When Toller was lost in his tranced vigils the conversation of the crew members and even the roar of the burner faded from his consciousness, and he was alone in the universe, sole possessor of all its scintillant hoards. Once during the hours of darkness, while he was standing at the pilot’s station, he saw a meteor strike across the sky below the ship. It traced a line of fire from what seemed to be one edge of infinity to the other, and minutes after its passing there came a single pulse of low-frequency sound — blurred, dull and mournful — causing the ship to give a tentative heave which drew a murmur of protest from one of the sleeping men. Some instinct, a kind of spiritual acquisitiveness, prompted Toller to keep the knowledge of the event from the others.
As the ascent continued Zavotle was kept busy with his copious flight records, many of the entries concerned with physiological effects. Even at the summit of the highest mountain on Land there was no discernible drop in air pressure, but on previous high-altitude sorties by balloon some crew members had reported a hint of thinness to the air and the need to breathe more deeply. The effect had been slight and the best scientific estimate was that the atmosphere would continue to support life midway between the two planets, but it was vital that the predication should be verified.
Toller was almost comforted by the feel of his lungs working harder during the third day — more evidence that the problems of interworld flight had been correctly foreseen — and he was therefore less than happy when an unexpected phenomenon forced itself on his attention. For some time he had been aware of feeling cold, but had dismissed the matter from his thoughts. Now, however, the others in the gondola were complaining almost continuously and the conclusion was inescapable — as the ship gained altitude the surrounding air was growing colder.
The S.E.S. scientists, Lain Maraquine included, had been of the opinion that there would be an increase in temperature as the ship entered ratified air which would be less able to screen it from the sun’s rays. As a native of equatorial Kolcorron, Toller had never experienced really severe coldness, and he had thought nothing of setting off on the interplanetary voyage clad in only a shirt, breeches and sleeveless jupon. Now, although not actually shivering, he was continuously aware of the increasing discomfort and a dismaying thought was beginning to lurk in his mind — that the entire flight might have to be abandoned for the lack of a bale of wool.
He gave permission for the crew to wear all their spare clothing under their uniforms, and for Flenn to brew tea on demand. The latter decision, far from improving the situation, led to a series of arguments. Time after time Rillomyner insisted that Flenn, acting out of malice or ineptitude, was either infusing the tea before the water had boiled properly or was allowing it to cool before serving it around. It was only when Zavotle, who had also been dissatisfied, kept a critical eye on the brewing process that the truth emerged — the water had begun to boil before it had reached the appropriate temperature. It was hot, but not “boiling” hot.
“I’m worried about this finding, captain,” Zavotle said as he completed the relevant entry in the log. “The only explanation I can think of is that as the water gets lighter it boils at a progressively lower temperature. And if that is the case, what is going to happen to us when the weight of everything fades away to nothing? Is the spit going to boil in our mouths? Are we going to piss steam?”
“We would be obliged to turn back before you had to suffer that indignity,” Toller said, showing his displeasure at the other man’s negative attitude, “but I don’t think it will come to that. There must be some other reason — perhaps something to do with the air.”
Zavotle looked dubious. “I don’t see how air could affect water.”
“Neither do I — so I’m not wasting time on useless speculation,” Toller said curtly. “If you want something to occupy your mind take a close look at the height gauge. It says we’re eleven-hundred miles up — and if that is correct we have been seriously underestimating our speed all day.”
Zavotle studied the gauge, fingered the rip line and looked up into the balloon, the interior of which was growing dim and mysterious with the onset of dusk. “Now that could be something to do with the air,” he said. “I think that what you have discovered is that thinner air would depress the crown of the envelope less at speed and make it seem that we’re going slower than we actually are.”
Toller considered the proposition and smiled. “You worked that out — and I didn’t — so give yourself credit for it in the record. I’d say you’re going to be the senior pilot on your next flight.”
“Thanks, captain,” Zavotle said, looking gratified.
“It’s no more than you deserve.” Toller touched Zavotle on the shoulder, making tacit reparation for his
irritability. “At this rate we’ll have passed the thirteen-hundred mark by dawn — then we can take a rest from the burner and see how the ship handles on the jet.”
Later, while he was settling down on the sandbags to sleep, he went over the exchange in his mind and identified the true cause of the ill temper he had vented on Zavotle. It had been the accumulation of unforeseen phenomena — the increasing coldness, the odd behaviour of the water, the misleading indication of the balloon’s speed. It had been the growing realisation that he had placed too much faith in the predictions of scientists. Lain, in particular, had been proved wrong in three different respects, and if his vaulting intellect had been defeated so soon — on the very edge of the region of strangeness — nobody could know what lay in store for those setting out along the perilous fractured glass bridge to another world.
Until that moment, Toller discovered, he had been naively optimistic about the future, convinced that the proving flight would lead to a successful migration and the foundation of a colony in which those he cared about would lead lives of endless fulfilment. It was chastening to realise that the vision had been largely based on his own egotism, that fate had no obligation to honour the safe conducts he had assigned to people like Lain and Gesalla, that events could come to pass regardless of his considering them unthinkable.
All at once the future had clouded over with uncertainty and danger.
And in the new order of things, Toller thought as he drifted into sleep, one had to learn to interpret a new kind of portent. Day-to-day trivia… the degree of slackness in a cord… bubbles in a pot of water… These were niggardly omens… whispered warnings, almost too faint to hear.… By morning the height gauge was showing an altitude of fourteen-hundred miles, and its supplementary scale indicated that gravity was now less than a quarter of normal.
Toller, intrigued by the lightness of his body, tested the conditions by jumping, but it was an experiment he tried only once. He rose much higher than he had intended and for a moment as he seemed to hang in the air there was a terrible feeling of having parted from the ship for ever. The open gondola, with its chest-high walls, was revealed as a flimsy edifice whose pared-down struts and wicker panels were quite inadequate for their purpose. He had time to visualise what would happen if a floor section gave way when he landed on it, plunging him into the thin blue air fourteen-hundred miles above the surface of the world.
It would take a long time to fall that distance, fully conscious, with nothing to do but watch the planet unfurl hungrily below him. Even the bravest man would eventually have to begin screaming.…
“We seem to have lost a good bit of speed during the night, captain,” Zavotle reported from the pilot’s station. “The rip line is getting quite taut — though, of course, you can’t rely on it much any more.”
“It’s time for the jet, anyway,” Toller said. “From now on, until turn-over, we’ll use the burner only enough to keep the balloon inflated. Where’s Rillomyner?”
“Here, captain.” The mechanic emerged from the other passenger compartment. His pudgy figure was partially doubled over, he was clutching the partitions and his gaze was fixed on the floor.
“What’s the matter with you, Rillomyner? Are you sick?”
“I’m not sick, captain. I… I just don’t want to look outside.”
“Why not?”
“I can’t do it, captain. I can feel myself being drawn over the side. I think I’m going to float away.”
“You know that’s nonsense, don’t you?” Toller thought of his own moment of unmanning fear and was inclined towards sympathy. “Is this going to affect your work?”
“No, captain. The work would help.”
“Good! Carry out a full inspection of the main jet and the laterals, and make very sure we have a smooth injection of crystals — we can’t afford to have any surges at this stage.”
Rillomyner directed a salute towards the floor and slouched away to fetch his tools. There followed an hour of respite from the full burn rhythm while Rillomyner checked the controls, some of which were common to the downward-facing jet. Flenn prepared and served a breakfast of gruel studded with small cubes of salt pork, all the while complaining about the cold and the difficulty he was having in keeping the galley fire going. His spirits improved a little when he learned that Rillomyner was not going to eat, and as a change from lavatorial humour he subjected the mechanic to a barrage of jokes about the dangers of wasting away to a shadow.
True to his earlier boast, Flenn seemed quite unaffected by the soul-withering void which glimmered through chinks in the decking. At the end of the meal he actually chose to sit on the gondola wall, with one arm casually thrown around an acceleration strut, as he goaded the unhappy Rillomyner. Even though Flenn had tethered himself, the sight of him perched on the sky-backed rim produced such icy turmoil in Toller’s gut that he bore the arrangement for only a few minutes before ordering the rigger to descend.
When Rillomyner had finished his work and retired to lie down on the sandbags, Toller took up his position at the pilot’s station. He entered the new mode of propulsion by firing the jet in two-second bursts at wide intervals and studying the effects on the balloon. Each thrust brought creaks from the struts and rigging, but the envelope was affected much less than in experimental firings at low altitudes. Encouraged, Toller varied the timings and eventually settled on a two-four rhythm which acted in much the same manner as continuous impulsion without building up excessive speed. A short blast from the burner every second or third minute kept the balloon inflated and the crown from sagging too much as it nosed through the air.
“She handles well,” he said to Zavotle, who was industriously writing in the log. “It looks as though you and I are going to have an easy run for the next day or two — until the instability sets in.”
Zavotle tilted his narrow head. “It’s easier on the ears, too.”
Toller nodded his agreement. Although the jet was firing for a greater proportion of every minute than the burner had been doing, its exhaust was not being directed into the great echo chamber of the balloon. The sound of it was flatter and less obtrusive, quickly absorbed by the surrounding oceans of stillness.
With the ship behaving so docilely and according to plan Toller began to feel that his forebodings of the night had been nothing more than a symptom of his growing tiredness. He was able to dwell on the incredible idea that in a mere seven or eight days, all being well, he was due to have a close look at another planet. The ship could not actually touch down on Overland, because doing so would involve pulling out the rip panel, and with no inflation facilities it would be unable to depart again. But it was to go within a few yards of the surface, dispelling the last traces of mystery about conditions on the sister planet.
The thousands of miles of air separating the two worlds had always made it difficult for astronomers to say much more than that there was an equatorial continent spanning the visible hemisphere. It had always been assumed, partly on religious grounds, that Overland closely resembled Land, but there remained the possibility that it was inhospitable, perhaps because of surface features beyond the resolving power of telescopes. And there was the further possibility — an article of faith for the Church, a moot case for philosophers — that Overland was already inhabited.
What would the Overlanders look like? Would they be builders of cities? And how would they react on seeing a fleet of strange ships float down from the sky?
Toller’s musing was interrupted by the realisation that the coldness in the gondola had intensified in a matter of minutes. Simultaneously, he was approached by Flenn, who had the pet carble clutched to his chest and was visibly shivering. The little man’s face was tinged with blue.
“This is killing me, captain,” he said, trying to force his customary grin. “The cold has got worse all of a sudden.”
“You’re right.” Toller felt a stirring of alarm at the idea of having crossed an invisible danger line in the atmosphere
, then inspiration came to him. “It’s since we eased off on the burner. The blow-back of miglign was helping to keep us warm.”
“There was something else,” Zavotle added. “The air streaming down over the hot envelope would have helped as well.”
“Damn!” Toller frowned up into the geometric traceries of the balloon. “This means we’ll have to put more heat in there. We have plenty of green and purple — so that’s all right — but there’s going to be a problem later on.”
Zavotle nodded, looking gloomy. “The descent.”
Toller gnawed his lip as, yet again, difficulties unforeseen by the earthbound S.E.S. scientists confronted him. The only way for the hot-air craft to lose altitude was through shedding heat — suddenly a vital commodity as far as the crew were concerned — and to make matters worse the direction of the air flow would be reversed during the descent, carrying the reduced amount of warmth upwards and away from the gondola. The prospect was that they would have to endure days in conditions very much worse than those of the present — and there was a genuine possibility that death would intervene.
A dilemma had to be resolved.
Was the fact that so much depended on the outcome of the proving flight an argument for going on and on, even at the risk of passing an imperceptible point of no return? Or was there a higher obligation to be prudent and turn back with their hard-won store of knowledge?
“This is your lucky day,” Toller said to Rillomyner, who was watching him from his usual recumbent position in a passenger compartment. “You wanted work to occupy your mind, and now you’ve got it. Find a way of diverting some heat from the burner exhaust back down into the gondola.”
The mechanic sat up with a startled expression. “How could we do it, captain?”
