The Complete Short Stories
detail.'
    M. shifted uneasily. 'There wasn't much to it, and what I do remember isn't too clear now.'
    The surgeon yawned. M. waited and then started to recite what he had already repeated twenty times.
    'I was suspended in the air above a flat stretch of open ground, something like the floor of an enormous arena. My arms were out at my sides, and I was looking down, floating - , 'Hold on,' the surgeon interrupted. 'Are you sure you weren't swimming?'
    'No,' M. said. 'I'm certain I wasn't. All around me there was free space. That was the most important part about it. There were no walls. Nothing but emptiness. That's all I remember.'
    The surgeon ran his finger along the edge of the rule.
    'Go on.'
    'Well, the dream gave me the idea of building a flying machine. One of my friends helped me construct it.'
    The surgeon nodded. Almost absently he picked up the charge sheet and crushed it with a single motion of his hand.
    'Don't be absurd, Franz!' Gregson remonstrated. They took their places in the chemistry cafeteria queue. 'It's against the laws of hydrodynamics. Where would you get your buoyancy?'
    'Suppose you had a rigid fabric vane,' Franz explained as they shuffled past the hatchways. 'Say ten feet across, like one of those composition wall sections, with hand grips on the ventral surface. And then you jumped down from the gallery at the Coliseum Stadium. What would happen?'
    'You'd make a hole in the floor. Why?'
    'No, seriously.'
    'If it was large enough and held together you'd swoop down like a paper dart.'
    'Glide,' Franz said. 'Right.' Thirty levels above them one of the intercity expresses roared over, rattling the tables and cutlery in the cafeteria. Franz waited until they reached a table and sat forward, his food forgotten.
    'And say you attached a propulsive unit, such as a battery-driven ventilator fan, or one of those rockets they use on the Sleepers. With enough thrust to overcome your weight. What then?'
    Gregson shrugged. 'If you could control the thing, you'd, you'd...'He frowned at Franz. 'What's the word? You're always using it.'
    'Fly.'
    'Basically, Matheson, the machine is simple,' Sanger, the physics lector, commented as they entered the science library. 'An elementary application of the Venturi Principle. But what's the point of it? A trapeze would serve its purpose equally well, and be far less dangerous. In the first place consider the enormous clearances it would require. I hardly think the traffic authorities will look upon it with any favour.'
    'I know it wouldn't be practical here,' Franz admitted. 'But in a large open area it should be.'
    'Allowed. I suggest you immediately negotiate with the Arena Garden on Level 347-25,' the lector said whimsically. 'I'm sure they'll be glad to hear about your scheme.'
    Franz smiled politely. 'That wouldn't be large enough. I was really thinking of an area of totally free space. In three dimensions, as it were.'
    Sanger looked at Franz curiously. 'Free space? Isn't that a contradiction in terms? Space is a dollar a cubic foot.' He scratched his nose. 'Have you begun to construct this machine yet?'
    'No,' Franz said.
    'In that event I should try to forget all about it. Remember, Matheson, the task of science is to consolidate existing knowledge, to systematize and reinterpret the discoveries of the past, not to chase wild dreams into the future.'
    He nodded and disappeared among the dusty shelves.
    Gregson was waiting on the steps.
    'Well?' he asked.
    'Let's try it out this afternoon,' Franz said. 'We'll cut Text 5 Pharmacology. I know those Fleming readings backwards. I'll ask Dr McGhee for a couple of passes.'
    They left the library and walked down the narrow, dimly-lit alley which ran behind the huge new civil engineering laboratories. Over seventy-five per cent of the student enrolment was in the architectural and engineering faculties, a meagre two per cent in pure sciences. Consequently the physics and chemistry libraries were housed in the oldest

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