The harsh blue lights of police cars revolved within my mind during the next three weeks as I lay in an empty ward of the casualty hospital near London Airport. In this quiet terrain of used-car marts, water reservoirs and remand centres, surrounded by the motorway systems that served London Airport, I began my recovery from the accident. Two wards of twenty-four beds – the maximum number of survivors anticipated – were permanently reserved for the possible victims of an air-crash. One of these was temporarily occupied by car-crash injuries.

Not all the blood which covered me had belonged to the man I killed. The Asian doctors in the emergency theatre found that both my knee-caps had been fractured against the instrument panel. Long spurs of pain reached along the inner surface of my thighs into my groin, as if fine steel catheters were being drawn through the veins of my legs.

Three days after the first surgery on my knees I caught some minor hospital infection. I lay in the empty ward, taking up a bed that belonged by rights to an air-crash victim, and thinking in a disordered way about the wounds and pains he would feel. Around me, the empty beds contained a hundred histories of collision and bereavement, the translation of wounds through the violence of aircraft and automobile crashes. Two nurses moved through the ward, tidying the beds and radio headphones. These amiable young women ministered within a cathedral of-invisible wounds, their burgeoning sexualities presiding over the most terrifying facial and genital injuries.

As they adjusted the harness around my legs, I listened to the aircraft rising from London Airport. The geometry of this complex torture device seemed in some way related to the slopes and contours of these young women's bodies. Who would be the next tenant of this bed – some middle-aged bank cashier en route to the Balearics, her head full of gin, pubis moistening towards the bored widower seated beside her? After a runway accident at London Airport her body would be marked for years by the bruising of her abdomen against the seat belt stanchion. Each time she slipped away to the lavatory of her provincial restaurant, weakened bladder biting at a worn urethra, during each sex act with her prostatic husband she would think of the few seconds before her crash. Her injuries fixed for ever this imagined infidelity.

Did my wife, when she visited the ward each evening, ever wonder what sexual errand had brought me to the Western Avenue flyover? As she sat beside me, her shrewd eyes itemizing whatever vital parts of her husband's anatomy were left to her, I was certain that she read the answer to her unspoken questions in the scars on my legs and chest.

The nurses hovered around me, carrying out their painful chores. When they replaced the drainage tubes in my knees I tried not to vomit back my sedative, strong enough to keep me quiet but not to relieve the pain. Only their sharp tempers rallied me.

A young, blond-haired doctor with a callous face examined the wounds on my chest. The skin was broken around the lower edge of the sternum, where the horn boss had been driven upwards by the collapsing engine compartment. A semi-circular bruise marked my chest, a marbled rainbow running from one nipple to the other. During the next week this rainbow moved through a sequence of tone changes Mice the colour spectrum of automobile varnishes. As I looked down at myself I realized that the precise make and model-year of my car could have been reconstructed by an automobile engineer from the pattern of my wounds. The layout of the instrument panel, like the profile of the steering wheel bruised into my chest, was inset on my knees and shin-bones. The impact of the second collision between my body and the interior compartment of the car was denned in these wounds, like the contours of a woman's body remembered in the responding pressure of one's own skin for a few hours after a sexual act.

On the fourth day, for no evident reason, the anaesthetics were withdrawn. All morning I vomited into the enamel pail which a nurse held under my face. She stared at me with good-humoured but unmoved eyes. The cold rim of the kidney pail pressed against my cheek. Its porcelain surface was marked by a small thread of blood from some nameless previous user.

I leaned my forehead against the nurse's strong thigh as I vomited. Beside my bruised mouth her worn fingers contrasted strangely with her youthful skin. I found myself thinking of her natal cleft. When had she last washed this moist gulley? During my recovery, questions like this one obsessed me as I talked to the doctors and nurses. When had they last bathed their genitalia, did small grains of faecal matter still cling to their anuses as they prescribed some antibiotic for a streptococcal throat, did the odour of illicit sex acts infest their underwear as they drove home from the hospital, the traces of smegma and vaginal mucus on their hands marrying with the splashed engine coolant of unexpected car-crashes? I let a few threads of green bile leak into the pail, aware of the warm contours of the young woman's thighs. A seam of her gingham frock had been repaired with a few loops of black cotton. I stared at the loosening coils lying against the round surface of her left buttock. Their curvatures seemed as arbitrary and as meaningful as the wounds on my chest and legs.

This obsession with the sexual possibilities of everything around me had been jerked loose from my mind by the crash. I imagined the ward filled with convalescing air-disaster victims, each of their minds a brothel of images. The crash between our two cars was a model of some ultimate and yet undreamt sexual union. The injuries of still-to-be-admitted patients beckoned to me, an immense encyclopedia of accessible dreams.

Catherine seemed well aware of these fantasies. During her first visits I had been in shock and she had made herself familiar with the layout and atmosphere of the hospital, exchanging good-humoured banter with the doctors. As a nurse carried away my vomit Catherine expertly pulled the metal table from the foot of the bed and unloaded on to it a clutch of magazines. She sat down beside me, casting a brisk eye over my unshaven face and fretting hands.

I tried to smile at her. The stitches in the laceration across my scalp, a second hairline an inch to the left of the original, made it difficult for me to change my expression. In the shaving mirror the nurses held up to my face I resembled an alarmed contortionist, startled by his own deviant anatomy.

'I'm sorry.' I took her hand. 'I must look rather sunk in myself.'

'You're fine,' she said. 'Absolutely. You're like someone's victim in Madame Tussaud's.'

'Try to come tomorrow.'

'I will.' She touched my forehead, gingerly peering at the scalp wound. 'I'll bring some make-up for you. I imagine the only cosmetic attention given to the patients here is at Ashford Mortuary.'

I looked up at her more clearly. Her show of warmth and wifely concern pleasantly surprised me. The mental distance between my work at the television commercial studios in Shepperton and her own burgeoning career in the overseas tours section of Pan American had separated us more and more during the past years. Catherine was now taking flying lessons, and with one of her boyfriends had started a small air-tourist charter firm. All these activities she pursued with a single mind, deliberately marking out her independence and self-reliance as if staking her claim to a terrain that would later soar in value. I had reacted to all this like most husbands, quickly developing an extensive repertory of resigned attitudes. The small but determined drone of her light aircraft crossed the sky over our apartment house each weekend, a tocsin that sounded the note of our relationship.

The blond-haired doctor walked through the ward, nodding to Catherine. She turned away from me, her bare legs revealing her thighs as far as her plump pubis, shrewdly summing up the sexual potential of this young man. I noticed that she was dressed more for a smart lunch with an airline executive than to visit her husband in hospital. Later I learned that she had been badgered at the airport by police officers investigating the road-death. Clearly the accident and any possible manslaughter charges against me had made her something of a celebrity.

'This ward is reserved for air-crash victims,' I told Catherine. 'The beds are kept waiting.'

'If I groundloop on Saturday you might wake up and find me next to you.' Catherine peered at the deserted beds, presumably visualizing each imaginary injury. 'You're getting out of bed tomorrow. They want you to walk.' She looked down at me solicitously. 'Poor man. Have you antagonized them in any way?'

I let this pass, but Catherine added, 'The other man's wife is a doctor – Dr Helen Remington.'

Crossing her legs, she began the business of lighting a cigarette, fumbling with an unfamiliar lighter. From which new lover had she borrowed this ugly machine, all too clearly a man's? Tooled from an aircraft cannon shell, it was more like a weapon. For years I had been able to spot Catherine's affairs within almost a few hours of her first sex act simply by glancing over any new physical or mental furniture – a sudden interest in some third-rate wine or film-maker, a different tack across the waters of aviation politics. Often I could guess the name of her latest lover long before she released it at the climax of our sexual acts. This teasing game she and I needed to play. As we lay together we would describe a complete amatory encounter, from the first chit-chat at an airline cocktail party to the sexual act itself. The climax of these games was the name of the illicit partner. Held back until the last moment, it would always produce the most exquisite orgasms for both of us. There were times when I felt that these affairs took place merely to provide the raw material for our sexual games.

Watching her cigarette smoke move away across the empty ward, I wondered with whom she spent the past few days. No doubt the thought that her husband had killed another man lent an unexpected dimension to their sex acts, presumably conducted on our bed in sight of the chromium telephone which had brought Catherine the first news of my accident. The elements of new technologies linked our affections.

Irritated by the aircraft noise, I sat up on one elbow. The bruises across my chest wall made it painful for me to breathe. Catherine peered down at me with a worried gaze, obviously concerned that I might die on the spot. She put the cigarette between my lips. I drew uncertainly on the geranium-flavoured smoke. The warm tip of the cigarette, stained with pink lipstick, carried with it the unique taste of Catherine's body, a flavour I had forgotten in the phenol-saturated odour of the hospital. Catherine reached for the cigarette, but I held on to it like a child. The grease-smeared tip reminded me of her nipples, liberally painted with lipstick, which I would press against my face, arms and chest, secretly imagining the imprints to be wounds. In a nightmare I had once seen her giving birth to a devil's child, her swollen breasts spurting liquid faeces.