The Complete Short Stories by J. G. Ballard

Doctor?'
    Morley swallowed a yawn. 'Well, if he is, that makes two of us.' He followed them along the corridor, doing his best to stay awake, feeling as if he, and not the three men in front of him, had been without sleep for the last three weeks.
    Though the Clinic was quiet, at Neill's orders all lights along the corridors and down the stairway had been left on. Ahead of them two orderlies checked that windows they passed were safely screened and doors were shut. Nowhere was there a single darkened alcove or shadow-trap.
    Neill had insisted on this, reluctantly acknowledging a possible reflex association between darkness and sleep: 'Let's admit it. In all but a few organisms the association is strong enough to be a reflex. The higher mammals depend for their survival on a highly acute sensory apparatus, combined with a varying ability to store and classify information. Plunge them into darkness, cut off the flow of visual data to the cortex, and they're paralysed. Sleep is a defence reflex. It lowers the metabolic rate, conserves energy, increases the organism's survival-potential by merging it into its habitat..
    On the landing halfway down the staircase was a wide, shuttered window that by day opened out on to the parkscape behind the Clinic. As he passed it Gorrell stopped. He went over, released the blind, then unlatched the shutter.
    Still holding it closed, he turned to Morley, watching from the flight above.
    'Taboo, Doctor?' he asked.
    Morley looked at each of the three men in turn. Gorrell was calm and unperturbed, apparently satisfying nothing more sinister than an idle whim. Lang sat on the rail, watching curiously with an expression of clinical disinterest. Only Avery seemed slightly anxious, his thin face wan and pinched. Morley had an irrelevant thought: four a. m. shadow - they'll need to shave twice a day. Then: why isn't Neill here? He knew they'd make for a window as soon as they got the chance.
    He noticed Lang giving him an amused smile and shrugged, trying to disguise his uneasiness.
    'Go ahead, if you want to. As Neill said, the wires are cut.'
    Gorrell threw back the shutter, and they clustered round the window and stared out into the night. Below, pewter-grey lawns stretched towards the pines and low hills in the distance. A couple of miles away on their left a neon sign winked and beckoned.
    Neither Gorrell nor Lang noticed any reaction, and their interest began to flag within a few moments. Avery felt a sudden lift under the heart, then controlled himself. His eyes began to sift the darkness; the sky was clear and cloudless, and through the stars he picked out the narrow, milky traverse of the galactic rim. He watched it silently, letting the wind cool the sweat on his face and neck.
    Morley stepped over to the window and leaned his elbows on the sill next to Avery. Out of the corner of his eye he carefully waited for any motor tremor - a fluttering eyelid, accelerated breathing that would signal a reflex discharging. He remembered Neill's warning: 'In Man sleep is largely volitional, and the reflex is conditioned by habit. But just because we've cut out the hypothalamic loops regulating the flow of consciousness doesn't mean the reflex won't discharge down some other pathway. However, sooner or later we'll have to take the risk and give them a glimpse of the dark side of the sun., Morley was musing on this when something nudged his shoulder.
    'Doctor,' he heard Lang say. 'Doctor Morley.'
    He pulled himself together with a start. He was alone at the window. Gorrell and Avery were halfway down the next flight of stairs.
    'What's up?' Morley asked quickly.
    'Nothing,' Lang assured him. 'We're just going back to the gym.' He looked closely at Morley. 'Are you all right?'
    Morley rubbed his face. 'God, I must have been asleep.' He glanced at his watch. Four twenty. They had been at the window for over fifteen minutes. All he could remember was leaning on the sill. 'And I was worried about