Leaving the bedroom door ajar, Sanger watched the sleeping young woman for a few moments before turning to me. He gestured with the kidney dish and hypodermic that he held in his hand, as if ready to offer me a sedative dose, and touched the dark stains on his jacket, reminding himself that the blood was not his own. His usually pallid cheeks and forehead were flushed with anger, and he gazed in a disoriented way at the books on his shelves, putting a past phase of his life, with its too-thoughtful dependencies, for ever behind him.

'She'll sleep for a few hours. We'll go on to the terrace. You probably need to rest.'

I expected him to change, but he was scarcely aware of his still-dripping clothes and the wet prints that his leaking shoes left on the tiled floor. He led the way to the umbrella and chairs beside the pool. Taking my seat, I noticed the upstairs windows of my villa and realized how close they were to the bungalow compound, and that he would have heard every sound during our boisterous parties.

'It's very quiet here,' I told him, and pointed to the calm surface of the pool, disturbed only by a small insect that struggled with the jelly-like meniscus clasping its wings. 'Your tenants have gone.'

'The Frenchwoman and her daughter? They flew back to Paris. In some ways the ambience wasn't suitable for the child.'

Sanger drew a hand across his eyes in an attempt to clear his mind. 'Thank you for the lift. I couldn't have carried her here.'

'I'm sorry she… collapsed.' I tried to think of a word that would better describe the nightmarish descent of the past weeks. Concerned for Sanger, I added: 'She shouldn't have left you. In her way she was happy here.'

'Laurie never wanted to be happy.' Sanger ran a hand through his damp hair, and then stared at the clots of blood left on his fingers. But he made no attempt to smooth the dishevelled mane that he had once tended so carefully. 'She's one of those people who flinch from the very idea of happiness-in her mind nothing could be more boring or bourgeois. I helped her a little, as I helped Bibi Jansen. Doing absolutely nothing is a kind of therapy in itself.'

'What about the nosebleed?' It occurred to me that she might be bleeding to death in her drugged sleep. 'Are you sure it's stopped?'

'I cauterized the septum. It seems that Crawford punched her – another of his Zen statements, so he said.'

'Dr Sanger…' I wanted to pacify this unsettled man, whose eyes were fixed on the bedroom door. 'It's hard to believe, but Bobby Crawford was fond of Laurie.'

'Of course. In his own deranged way. He wanted her to find her true self, as he would call it-like everyone else at the Residencia Costasol. I'm sorry he took against me.'

'You're one of the very few people he personally resents. You're a psychiatrist 'And not the first one he's met.' Sanger noticed the water streaming from his shoes. 'I must change – do wait here and I'll bring something to drink. As a friend of Crawford's, it's important that you hear of the decision I've made.'

He returned ten minutes later, wearing sandals and a floor-length towelling robe. He had washed the blood from his hands and hair, but the careful grooming and dilettante manner now belonged to the past.

'Thank you again for your help,' he told me, as he set a tray of brandies and soda on the table. 'Laurie is sleeping, I'm glad to say. I've been anxious about her for months. It's difficult to know what to tell her father, though the poor man is scarcely in a frame of mind to care.'

'I feel the same way,' I assured him. 'It's not something I've enjoyed seeing.'

'Of course not.' Sanger nodded to me. 'Mr Prentice, I distinguish you completely from Bobby Crawford-and from Mrs Shand and Hennessy. My position here is ambiguous. Technically I've retired, but in fact I still practise, and Laurie Fox is one of my patients. I can put up with a certain amount of harassment from Crawford, but the time has come to speak out. Crawford must be stopped-I know you agree with me.'

'I'm not sure if I do.' I played with the brandy tumbler, aware that Sanger was watching the open windows of my villa. 'Some of his methods are a little too… aggressive, but on the whole he's a force for good.'

'Good?' Sanger took the tumbler from my hand. 'He uses violence quite openly, against Paula Hamilton and Laurie and anyone else who stands in his way. The Residencia Costasol is awash with cut-price drugs that he force-feeds into almost every house and apartment.'

'Dr Sanger… to Crawford's generation cocaine and amphetamines are no more than mood-enhancers, like brandy or Scotch. The drugs he loathes are the ones you prescribe-the tranquillizers, especially. Perhaps he was sedated for a long period as a boy, or by the army psychiatrists who had him cashiered. He told me once that they tried to steal his soul. He's not a corrupt man. In many ways he's an idealist. Look at what he's achieved in the Residencia Costasol. He's done so much good.'

'Even more frightening.' Sanger lowered his eyes from my villa, satisfied that no one was observing us. 'This man is a danger to everyone he meets. He travels from place to place along the coast with his tennis racket and his message of hope, but his vision is as toxic as snake venom. All this ceaseless activity, these art festivals and town councils are a form of social Parkinsonism. The so-called renaissance everyone sings about is bought at a price. Crawford is like L-dopa. Cataleptic patients wake up and begin to dance. They laugh, cry, speak and seem to recover their real selves. But the dosage must be increased, to the point where it will kill. We know what medicine Crawford prescribes. This is a social economy based on drug-dealing, theft, pornography and escort services – from top to bottom a condominium of crime.'

'But no one thinks of it as crime. Neither the victims nor the people who take part. There's a different set of social conventions, as there is in the boxing ring or the bull-fight arena. Theft and prostitution exist here, but everyone sees them as "good works" of a new kind. No one at the Residencia Costasol has reported a single crime.'

'The most telling fact of all.' Sanger brusquely pushed away a lock of hair that tried to intrude across his field of vision. 'The ultimate crime-based society is one where everyone is criminal and no one is aware of the fact. Mr Prentice, this will change.'

'You're going to the police?' I watched Sanger's jutting jaw, an unexpected strain of pugnacity. 'If you bring in the Spanish authorities you'll destroy everything that's good here. Besides, we already have our own volunteer police force.'

'The kind of police who enforce a rule of crime. Your retired stockbrokers and accountants are remarkably adept in the role of small-town criminals. One could almost assume that their professions were designed for just such a contingency.'

'Cabrera and his detectives have been here. They've found nothing. No one has ever been charged.'

'Except for your brother.' Sanger had softened his harsh tone. 'His trial starts tomorrow. How will he plead?'

'Guilty. It's a nightmarish kind of irony. He's the one man here who's completely innocent.'

'Then Crawford should take his place.' Sanger rose to his feet, ready for me to leave, his ears listening for any sounds from the bedroom. 'Go back to London, before you join Crawford in Zarzuella jail. He's changed you, Mr Prentice. You now accept his logic without understanding where it will lead. Remind yourself of the Hollinger fire and all those tragic deaths…'

Hearing a murmur from the bedroom, Sanger fastened his dressing-gown and left the terrace. When I let myself through the front door he was sitting on the bed beside Laurie Fox, a hand stroking her damp hair, a father and lover waiting for this wounded child to meet him once again in her waking sleep.