her cheeks, staring with him as the pool of light from the torch shone down on that grotesque and mutilated face. And in that twilight world between waking and sleeping she saw that it was a face she knew, her own. She jerked back to consciousness with a little cry of terror, switched on the bedside lamp, reached out for her book and began resolutely to read. Half an hour later, the book slipped out of her hand and she fell into the first of the night's uneasy periods of slumber.

It took only two minutes of lying stretched and rigid on his bed for Alex Mair to realize that sleep was unlikely to come. To lie in bed wakeful had always been intolerable to him. He could manage with little sleep but that was invariably sound. Now he swung his legs out of bed, reached for his dressing gown and walked over to the window. He would watch the sun rise over the North Sea. He thought back over the last few hours, the acknowledged relief of talking to Alice, the knowledge that nothing shocked her, nothing surprised her, that everything he did, if not right in her eyes, was judged by a different standard from the one she rigorously applied to the rest of her life.

The secret that lay between them, those minutes when he had held her shaking body against the tree trunk and stared into her eyes, compelling obedience, had bound them with a cord so strong that it couldn't be frayed, either by the enormity of their shared guilty secret, or by the small rubs of living together. And yet they had never spoken of their father's death. He didn't know whether Alice ever thought of it, or whether the trauma had erased it from her mind so that she now believed the version he had formulated, had taken the lie into her unconscious and made it her truth. When, quite soon after the funeral, seeing how calm she was, he had imagined that possibility he had been surprised at his reluctance to believe it. He didn't want her gratitude. It was degrading even to contemplate that she would feel an obligation towards him. Obligation and gratitude were words they had never needed to use. But he did want her to know and to remember. The deed was to him so monstrous, so surprising, that it would have been intolerable not to have shared it with a living soul. In those early months he had wanted her to know the magnitude of what he had done and that he had done it for her.

And then, six weeks after the funeral, he had suddenly found himself able to believe that it hadn't happened, not in that way, and that the whole horror was a childhood fantasy. He would lie awake at night and see his father's crumbling figure, the leap of blood like a scarlet fountain, would hear the harshly whispered words. In this revised and comforting version there had been a second of delay, no more, and then he had raced for the house shouting for help. And there was a second and even more admirable fantasy in which he had knelt at his father's side, had pressed his clenched fist hard into the groin, quenching the spurting blood, had whispered reassurance into those dying eyes. It had been too late, of course; but he had tried. He had done his best. The coroner had praised him, that precise little man with his half-moon spectacles, his face like a querulous parrot. 'I congratulate the deceased's son who acted with commendable promptness and courage and did everything possible to try to save his father's life.'

The relief of being able to believe in his innocence was at first so great that temporarily it overwhelmed him. He had lain in bed night after night drifting into sleep on a tide of euphoria. But he had known, even then, that this self-administered absolution was like a drug in the bloodstream. It was comforting and easy, but it wasn't for him. That way lay a danger more destructive even than guilt. He had told himself: 'I must never believe that a lie is the truth. I may tell lies all my life if it's expedient but I must know them for what they are and I must never tell them to myself. Facts are facts. I have to accept them and face them and then I can learn how to deal with them. I can look for reasons for what I did and call those reasons excuses; what he did to Alice, how he bullied Mother, how I hated him. I can attempt to justify his death at least to myself. But I did what I did and he died as he died.'

And with that acceptance came a kind of peace. After a few years he was able to believe that guilt itself was an indulgence, that he didn't need to suffer it unless he chose. And then there came a time when he felt a pride in the deed, in the courage, the audacity, the resolution which had made it possible. But that, too, he knew was dangerous. And for years afterwards he hardly thought of his father. Neither his mother nor Alice ever spoke of him except in the company of casual acquaintances who felt the need to utter embarrassed condolences from which there was no escape. But in the family only once was his name mentioned.

A year after the death his mother had married Edmund Morgan, a widowed church organist of mind-numbing dullness, and had retired with him to Bognor Regis where they lived on his father's insurance money in a spacious bungalow in sight of the sea, in an obsessive mutual devotion which mirrored the meticulous order and tidiness of their world. His mother always spoke of her new husband as Mr Morgan. 'If I don't talk to you about your father, Alex, it isn't that I've forgotten him, but Mr Morgan wouldn't like it.' The phrase had become a catchword between him and Alice. The conjunction of Morgan's job and his instrument offered endless possibilities of adolescent jokes, particularly when he and their mother were on honeymoon. 'I expect Mr Morgan is pulling out all his stops.' 'Do you suppose Mr Morgan is changing his combinations?' 'Poor Mr Morgan, labouring away. I hope he doesn't run out of wind.' They were wary, reticent children, yet this joke would reduce them to screams of helpless laughter. Mr Morgan and his organ releasing them into hysterical laughter had anaesthetized the horror of the past.

And then, when he was about eighteen, reality of another kind intruded itself and he said aloud, 'I didn't do it for Alice, I did it for myself, and thought how extraordinary it was that it had taken four years to discover that fact. And yet was it a fact, was it the truth, or was it merely a psychological speculation which in certain moods he found it interesting to contemplate?

Now, looking out over the headland to the eastern sky already flushed with the first faint gold of dawn, he said aloud: 'I let my father die deliberately. That is a fact. All the rest is pointless speculation.' In fiction, he thought, Alice and I should have been tormented by our joint knowledge, distrustful, guilt-ridden, unable to live apart yet miserable together. Yet since his father's death there had been nothing between him and his sister but companionship, affection, peace.

But now, nearly thirty years later, when he thought he had long come to terms with the deed and his own reaction to it, memory had begun to stir again. It had started with the first Whistler murder. The word 'murder' itself constantly on someone's lips, like a sonorous curse, seemed to have the power to evoke those half-suppressed images of his father's face which had become as unclear, as devoid of any life, as an old photograph. But in the last six months his father's image had begun to intrude on his consciousness at odd moments, in the middle of a meeting, across a boardroom table, in a gesture, the droop of an eyelid, the tone of a voice, the line of a speaker's mouth, the shape of fingers splayed to an open fire. His father's ghost had returned in the tangle of late-summer foliage, the first fall of the leaves, the tentative autumn smells. He wondered if the same thing was happening to Alice. For all their mutual sympathy, for all the sense he had of their being irrevocably bound together, this was the one question he knew he would never ask.