'Your new home, Charles. Take a look. Handsome, isn't it?'

'Very. Are you going to burgle it?'

'Only when you've settled in. You'll be happy here. I want to get you away from the Club Nautico. Sometimes one can have too many memories.'

We approached the gates of an untenanted villa in a quiet residential avenue three hundred yards to the west of the central plaza. An estate office's signpost impaled the square of yellowing grass beside the empty swimming pool. Unoccupied since its construction, the house seemed almost ghostly in its faded newness, haunted by the human occupants who had never lived in its vacant rooms but left their imprints like patches of fog on an exposed photographic film.

'It's an imposing place,' I commented as we stepped from the car. 'Why has no one lived here?'

'The owners died before they could leave England, and there was some sort of family dispute over probate. Betty Shand picked it up for a song.'

Crawford unlocked the gates and strolled along the drive ahead of me. The kidney-shaped pool resembled a sunken altar reached by the chromium ladder. Votive offerings of a dead rat, a wine bottle and a sun-bleached property brochure waited for whatever minor deity might claim them. The garden of unwatered palms and bougainvilleas was blanched by the heat. Dusty windows, through which no one had ever stared, now sealed off the unfurnished rooms.

Crawford gripped the estate office's sign and worked the post to and fro. He wrenched it from the dry soil and threw it to the ground. Climbing the tiled steps to the front door, he took a set of keys from his pocket.

'You'll be glad to know that we won't break in – it seems strange going in through the front door, almost illicit. I want you to experience the Residencia Costasol at first-hand. The mysteries of life and death hover over villas like this…'

He let us into the silent interior. Sunlight fell through the unshaded windows, blunted by the dust. The empty rooms lay around us, their white walls enclosing nothing, ready for dramas of boredom and ennui, the meaningless flicker of a thousand football matches. Devoid of all furniture and ornaments, the house lacked any clear function. The fitted kitchen resembled a survival station, part intensive care unit, part medical dispensary. As Crawford watched me approvingly I realized that his character-reading was all too accurate-I already felt at ease in the villa, free of the encumbrances of the past, the terminal moraine of memories that lay for ever around my feet.

'Charles, you've come home…' Crawford beckoned to me, urging me to stroll around the large living room. 'Enjoy the sensation-strangeness is closer to us than we like to think.'

'Perhaps it is. Empty houses have a special magic. I'm not sure if I want to live here. What about the furniture?'

'Delivered tomorrow. White-on-white drapes, chrome and black leather, absolutely you. Betty Shand's choice, not mine. Meanwhile, let's see the next floor.'

I followed him up the stairs, where the landing divided into wide corridors and an exposed concrete terrace like a side-chapel of the sun. I walked around the empty bedrooms and their mirror-walled bathrooms, trying to imagine how newly-arrived residents would respond to these motionless interiors, cut off from the world by their security systems and sensors. The outer desert of the Residencia Costasol was reflected in the inner desert of these aseptic chambers. The lighter gravity of this strange planet would numb the brain and maroon the residents in their armchairs, eyes clinging to the horizon lines of their television screens as they tried to stabilize their minds. By forcing a window or jemmying a kitchen door Crawford had broken the spell, and the clocks would begin to race again…

'Bobby…?' Leaving the master-bedroom, and its view over the palm garden and tennis court below, I searched the corridor. The nearby bedrooms were empty, and I at first assumed that he had abandoned me to the house as part of some teasing experiment. Then I heard him moving around a small back bedroom that overlooked the kitchen courtyard.

'Charles, I'm in here. Come and see – it's rather unusual…'

I stepped into the unfurnished room with its miniature bathroom scarcely larger than a broom cupboard. Crawford stood by the window, peering through the slatted blades of a Venetian blind.

'The maid's room?' I asked. 'I hope she's pretty.'

'Well… we haven't thought of that, yet. But it does have an interesting view.'

Crawford's fingerprints were visible on the dusty vanes as he parted them for me. Beyond the kitchen courtyard lay the tennis court, its clay surface recently swept and chalked. A crisp new net hung between the posts, and a tennis machine similar to the Club Nautico's stood at the baseline, waiting for its first opponent.

But Crawford was not admiring the tennis court he had generously prepared for me. To our left, beyond the perimeter wall that followed the drive down to the avenue, was the neighbouring estate, a trio of handsome bungalows grouped like motel cabins around a shared swimming pool. For once the flat terrain of the Residencia Costasol had yielded to rising ground, a modest hill that gave the three dwellings a pleasant view over the surrounding gardens and brought the pool within clear sight of the window through which we peered.

Light trembled across the palm trunks and dappled the walls of the bungalows, reflected from the broken water. A teenaged girl stepped from the pool and stood bare-breasted on the verge, fingers squeezing the water from her nose. Her blonde hair lay across her shoulders like fraying hemp. Shouting to herself, she ran along the verge and dived noisily into the water.

'She's lovely, isn't she, Charles? Beautiful, in a damaged way. You should be able to do a lot with her.'

'Well…' I watched the teenager splashing in the shallow end, whooping at the rainbows lifting from her palms. 'She's certainly sweet.'

'Sweet? My God, you've moved in some tough circles. I wouldn't call her sweet.'

I watched the girl playfully slapping the water, and then realized that Crawford was gazing beyond the pool to a sun-shaded table beside the nearest bungalow. A slim, silver-haired man with a matinee idol's handsome profile stood beside the umbrella in a silk dressing-gown. He waved to the girl in the pool and raised his glass, admiring her eager but unskilled dives. Little more than thirty feet away, I could see the wistful smile on his thin lips.

'Sanger? So these are the bungalows he owns 'His Garden of Eden.' Crawford bit the grimy vane with his teeth. 'He can play God, Adam and the serpent without having to change his fig-leaf. One of the bungalows is the office where he sees his patients. The other he lets to a Frenchwoman and her daughter – the girl in the pool. The third he shares with his latest protegee. Look under the umbrella.'

Sitting in a deckchair beneath the parasol was a young woman in a cotton nightdress of the type issued in hospital emergency wards. One arm rested on a clutch of unread paperbacks, exposing the infected puncture-holes that covered the inner surface from wrist to elbow. She fiddled with an empty medicinal glass, as if unable to focus on anything around her until she had received her next dose. Her dark hair had been shaved almost to the scalp, exposing the bony scars that ran above her temples. When she turned to stare at the pool the gold rings in her right nostril and lower lip caught the sun, briefly lighting her sallow face. Her toneless cheeks reminded me of the heroin addicts I had seen in the prison hospital in Canton, unconcerned by the death penalties they faced because they had already taken their seats in the tumbril.

Yet as I stared at this deteriorated young woman I sensed that some kind of wayward spirit was struggling to rouse itself from the deep Largactil trance into which Sanger had cast her. She seemed morose and sullen, but now and then her eyes would fix themselves on some interior image, a memory of a time when she had been alive. Then an almost louche smile quirked her lips, and she turned her head to gaze in an amused and even mischievous way at the sedate bungalows and their filtered pool, a princess in her tower searching for a chemise to wave, a prisoner of the medical profession's good intentions. Her true home was the druggies' squat and the pus-stained mattress, a realm of shared needles and absent hopes where moral judgements were never made. Against the backdrop of the Residencia Costasol, with its impeccable villas and sensible citizenry, she held out the promise of a free and unrooted world. For the first time I understood why Andersson and Crawford had so treasured Bibi Jansen.