Throughout these activities Hawksmoor, still without his overcoat despite the steady light rain, kept up a low whispering; it would have appeared to anyone who knew nothing of police procedure that this man had gone entirely mad, and was talking to himself within two feet of a corpse, but in fact Hawksmoor was reciting his own observations into a small tape-recorder.

His last comment was, 'Nothing else here', when the pathologist arrived; he was a small, corpulent man who nevertheless conveyed a certain air of stateliness as he slowly climbed the steps of St Mary Woolnoth. He nodded to Hawksmoor and then, murmuring 'Yes, I see the body', he knelt down beside the corpse and opened a small brown bag. For a moment he paused, his fingers quivering.

'I'm sorry to get you up so early,' Hawksmoor was saying but he had already taken out his knife and with one rapid movement had cut through the abdomen; he now placed a thermometer beside the liver of the dead child and then leaned back to survey his handiwork. Then, whistling almost imperceptibly, he stood up in order to talk to Hawksmoor.

'You hardly need me to tell you, do you, superintendent?'

'I do, sir, thank you very much. Eventually I need you to tell me the time.'

'Ah well, time waits for no man.' He stepped back and looked at the broken pillars. 'It's a fine church, isn't it, superintendent? They don't build them like that any more…'His voice trailed off as his attention was once more drawn to the body.

'I don't know who "they" are, Sir.' But he was already down on his knees, blinking as the arc-lights were suddenly turned off. They were somehow embarrassed in each other's company and, as the pathologist waited to take a second reading of the temperature, Hawksmoor walked behind the canvas screens and across the street to Poultry. From the corner there, he could see the front of the church entire: he had passed it before but he had never looked at it, and now it seemed startlingly incongruous in its setting despite the fact that other buildings so pressed in upon it that it was almost concealed. He imagined that very few who passed its walls realised that they were the walls of a church and as a result the building, massive through it was, had managed to disappear from sight. And even for him it was only now, after this death, that it emerged with the clarity and definition which it must have possessed for those who looked upon it when it was first built. Hawksmoor had often noticed how, in the moments when he first came upon a corpse, all the objects around it wavered for an instant and became unreal -the trees which rose above a body hidden in woodland, the movement of the river which had washed a body onto its banks, the cars or hedges in a suburban street where a murderer had left a victim, all of these things seemed at such times to be suddenly drained of meaning like an hallucination. But this church had grown larger and more distinct in the face of death.

He walked back to the steps and the pathologist took him aside for a few moments; then he called the other officers over to him. The situation now is this,' he explained quietly as the sun rose above the buildings, That the body can be moved up to the mortuary where the professor will be carrying out the post-mortem. What we want to know now, of course, is what we have learned here which might be of interest to the professor.' He looked across at the corpse as one label was attached to each wrist and ankle. It was placed in a polythene bag which was sealed at both ends and then, wrapped within an opaque transit sheet, it was carried to a stretcher before being taken to a police van parked at the corner of Lombard Street. Some women cried out in grief or alarm as the stretcher was taken through the small crowd which had assembled; and when a young girl tried to touch the side of the plastic sheet, her arm was knocked roughly away by one of the policemen carrying it. Hawksmoor saw all this and smiled, before turning round to face the red-headed woman who had discovered the body.

He watched her now with some interest as she sat by the railings of the old church and, thinking herself unobserved among all this activity, took out a small pocket mirror from her handbag; she was patting her hair into shape, turning slightly to one side and then to the other as she did so. Then she stood up, and he noticed that the damp stone had left a large stain on the back of her dress. Hawksmoor was interested in her because he always studied the reactions of those who came across the corpses of the violently slain -although most of them simply ran from the sight, as if to protect themselves from the agony and corruption which a murdered body represents. It was his belief that even the finder of that body can become an accomplice in its fate and, by completing the process which leads to its dicovery, can also suffer guilt. But this woman had stayed. He walked over to the officer who had been interviewing her: 'Did you get what you could out of her?'

'I got what I could, but it wasn't much. She doesn't have a clue, sir.'

'And I don't have a clue. What about time?'

'She only recalls time insomuch as it was raining, sir.'

Hawksmoor looked at the woman again; now that he was closer to her he noticed a certain slackness around her mouth, and the expression of puzzled intensity as she stared at the twin towers of the church. And he understood why she had not fled, but had stayed watching over the body of the murdered boy until someone else had come. 'She doesn't know the time of day, sir,' the officer added as Hawksmoor walked towards the woman.

He approached her slowly, so as not to alarm her. There now,' he said when he came to her, 'It was raining when you found him?'

'Raining? It was raining and it wasn't raining.' She stared into his face, and he flinched.

'And what was the time?' he asked her softly.

'Time? There was no time, not like that.'

'I see.'

And then she laughed, as if they had been sharing some enormous joke. 'I see you,' she said and gave him a push with her hand.

'Did you see him?'

'He had red hair like me'.

'Yes, you have nice red hair. I like your hair very much. And did he speak to you?'

'He don't say much, not him. I don't know what he said.'

For one instant Hawksmoor wondered if she was talking about the boy. 'And what did he do?'

'He seemed to be moving, do you know what I mean? And then he wasn't moving. What do they call this church?'

He had forgotten and in panic he swung round to look at it; when he turned back she was peering into her handbag. 'Well, Mary,' he said, 'We'll be meeting again soon, I hope?' At this she started crying, and in his embarrassment he walked away from her into Cheapside.

Generally he knew by instinct the likely length of an investigation, but on this occasion he did not: as he fought to get his breath he suddenly saw himself as others must see him, and he was struck by the impossibility of his task. The event of the boy's death was not simple because it was not unique and if he traced it backwards, running the time slowly in the opposite direction (but did it have a direction?), it became no clearer. The chain of causality might extend as far back as the boy's birth, in a particular place and on a particular date, or even further into the darkness beyond that. And what of the murderer, for what sequence of events had drawn him to wander by this old church? All these events were random and yet connected, part of a pattern so large that it remained inexplicable. He might, then, have to invent a past from the evidence available -and, in that case, would not the future also be an invention? It was as if he were staring at one of those puzzle drawings in which foreground and background create entirely different images: you could not look at such a thing for long.