'It seemed like a good idea. Nothing happened. We tried a few things, both had some tests which were inconclusive. Anyway, he's married now with two daughters. You've got to laugh, haven't you?'

'Why didn't you tell me, Kim?'

'I'm telling you now. It was important for me to tell you about it. I want you to know that you can lean on me because you can trust me to lean on you.'

'But you didn't lean on me.'

'Don't be silly, Jane, I've always depended on you.'

We hugged and I left her standing in the doorway with her funny sheepish grin on her face, but I felt dissatisfied by our talk. I thought back over our friendship of weekends away, lunches, cups of tea in greasy spoons, long walks. Was Kim right? I wondered if our relationship had consisted of me seeking support and Kim giving it to me. Even her revelation, long after its importance had pa.s.sed, seemed a sop to me to encourage me to depend on her. As I cycled along the ca.n.a.l towpath I constructed a version of our relationship in which I was always the fallible, needy one and Kim was always the resilient free spirit. Was this what even the closest friendships were like? One who gave and one who received?

Helen Auster was alone this time. She came up the stairs to our office looking touchingly ill at ease, panting at the length of the climb and the weight of her bulky shoulder bag. We shook hands and then I led her across to my desk. She was immediately impressed by the view and I pointed out the wharf below, by the ca.n.a.l, showed her the direction I cycled back, then took her across to the other side to show her the tower over on the Isle of Dogs which, I told her, had somehow single-handedly managed to make the skyline of London look frivolous.

'I like it,' she said.

I poured us both a coffee and we sat at my desk.

'What do you want to talk about?' I asked. 'Talking to the police always makes me feel guilty.'

'I don't think this meeting will be anything like that,' said Helen.

'It must be difficult to start up a murder inquiry again after a gap of twenty-five years.'

'Between you and me,' said Helen, 'we're starting from scratch. The CID back then went on considering Natalie to be a runaway. And so,' she gave her bulging case a pat, 'we're doing it now.'

She unzipped her case and removed a slim file. She handed me two lots of paper, each stapled together.

'These are two lists of names,' she said. 'The first is of people who were present at the party for Alan and Martha Martello on Sat.u.r.day 26 July, 1969. The second is of people who were present I mean staying at the house or in the vicinity or just visiting for the day on the following day, the Sunday, when Natalie was last seen.'

I looked through the names. There were pages of them.

'This is extraordinary,' I said. 'How did you get all these names? Was there a guest list?'

'No, we've been talking to various members of the family. The most help was from Theodore Martello. I've seen him a few times now. He's got the most amazing memory.' Was she blushing?

'He certainly has. There are names here I've completely forgotten. I don't think I've seen William f.a.gles since the party. It says here that the Courtneys now live in Toronto. They were the parents of one of Natalie's best friends. Can I have copies of these lists?'

'These are your copies. If you could just have a look through, it may jog your memory. You'll see that some of the guests are only identified by their first names and you may be able to complete them. You may think of some others as well.'

'Well, for a start, the Gordon here must be Gordon Brooks. He used to be a friend of the twins.'

'I haven't gone through the list with them yet. But just write it in.'

'It sounds a terribly dull process.'

'It's more exciting than what some of the other officers are doing, I can tell you.'

'Have you talked to Alan yet?'

'Yes, of course,' Helen said. 'Let me show you what I'm reading.'

She reached into her case and pulled out a bright new Penguin edition of The Town Drain. The Town Drain.

'Are you enjoying it?'

'It's wonderful. Not that I know very much about literature... but I think it's terribly funny. Alan Martello's so grand now, it's hard to imagine him writing something that's so... well, disrespectful.'

'I don't think he's really all that grand.'

'He was quite stern with me when I asked him what he was writing at the moment. You're quite a family, aren't you?'

'People have always seemed to think so. If you're going to read all the books written by members of the family, you'll need to take a sabbatical. For a start, there are all the children's books that Martha has ill.u.s.trated. They're quite wonderful, some of them. All the time that Alan was noisily, theatrically blocked with his writing, Martha was steadily and quietly working away.'

'I think I'll stick with Alan Martello for the moment. Are the rest of his books good?'

'There is only one other novel, and a couple of short story collections. Nothing that comes near to matching up to The Town Drain. The Town Drain. But don't dare tell him I said so.' But don't dare tell him I said so.'

We chatted for a few minutes about other things. Helen asked me about architecture and I asked her why she'd joined the police. She told me that she'd studied physics at university and then had had a vision of a life spent in a research laboratory and had suddenly rebelled against it. I liked her for that. She drank the last of her coffee.

'I think I'd better go,' she said. 'Once you've looked through that, we could meet again, if you like. I'm down in London quite a lot at the moment.'

'Doesn't your husband mind?'

'He works harder than I do.'

I walked with Helen to the top of the stairs. I had to say something. 'Helen, twenty-five years is a long time. Is there any point to this?'

'Of course.'

'I thought you might be able to do a DNA test on the... you know, the baby, but Claud says you can't after all that time.'

Helen smiled. 'That's right.'

'So there's no forensic evidence.'

'There are one or two other possibilities. No subst.i.tute for good old-fashioned police work, though. As our Chief keeps telling us. Goodbye, Jane, see you soon.'

My father was refusing to have anything at all to do with the programme. Paul had begged and bl.u.s.tered, and even sent Erica round bearing bulbs for Dad's garden as her excuse to put the case on his behalf. Yet it never occurred to me to turn Paul down.

I biked hurriedly through the damp air that was becoming thin drizzle to the Soho restaurant that Paul had selected. His research a.s.sistant was a young woman called Bella very tall and skinny, with a halo of red hair and large, kohl-rimmed eyes that she kept fixed adoringly on Paul. She smoked acrid cigarettes lighting each one off the one before, drank mineral water and picked at a side salad.

Over poached eggs, I asked Paul who else he was seeing.

'You know Dad's not talking to me?' I nodded. 'But Alan's being marvellous. I've already had two sessions with him. My G.o.d, he can talk. He's grown his beard and hair longer, you know, and he's looking gaunt and wild. He quoted poetry at me, and talked a lot about the weakest being the strongest, or something like that, and when he described our summers together it was like hearing a novel being read out.'

I pulled a face. 'He's spent the last couple of decades in pubs and restaurants like this, talking his novel away.'

Paul, dipping brown bread into his egg yolk and gulping red wine, took no notice.

'He wouldn't really talk much about Natalie, but he gave me some photographs. Martha didn't exactly say she wouldn't talk to me, but when I turned on the tape recorder and asked her questions, she just sort of smiled at me this really sad, wispy smile and shook her head. She doesn't look a happy woman, Jane.'

'She's ill,' I said, and then asked, 'What about the others?'

'They'll all talk. Everybody wants to be on television. Theo considers himself real tele-guru material. Alfred and Jonah seem all set. Claud is being helpful.' He glanced sideways at me and Bella also looked at me with curiosity. 'It's going to be interesting, Jane. And big too, I think. We'll be like the Waltons.'

'I think I will have some of that wine,' I said. 'What are you going to ask me then?' Bella leant forward and clicked on the tape recorder.

'Is that all right?' she asked, but it was a rhetorical question. This was TV. What could I have against it?

It's strange, alarming really, how we will talk to a tape recorder and a potential audience of anonymous unthreatening millions, the way we won't, can't, talk to a friend or a lover. Or a brother. Paul asked me about my memories of the Stead ('Just tell me them at random, as they occur to you,' he said), and as the spools on the recorder whirled, and Bella's pen scratched busily in her notebook, I plucked forth memories I hadn't known I'd kept. Croquet on the lawn; wild games of tag; expeditions through the woods with Claud being the leader, secret midnight feasts with food pilfered from the Stead's generous larder, the dribbly, slack-mouthed retriever the Martellos used to have (was Candy his name?), who would jump clumsily into the stream for sticks; raspberries under a green net that we would pick on hot afternoons; jam-making days (gooseberry, blackberry, strawberry, loganberry, damson, plum), stinging sunburn when we would rub lotion into each other's shoulders; loud lunches when we'd all show off and Alan would egg us on. I remembered early mornings, when the dew was still on the gra.s.s, and long evenings, when the grown-ups were eating their supper and we could hear the c.h.i.n.k of knives on plates, the murmur of conversation, and we would pull wellingtons on over bare legs and run down the garden to the swing in the great copper beech tree. In these memories, we children moved as one group, the adults were always in the background, and it was always sunny. It wasn't really what Paul wanted.

'It's interesting,' said Paul, 'that you're only remembering when you were very little. What about later, when you were a teenager?'

Suddenly the wine turned sour in my mouth. Why was I going along with this? I wanted to stop it. 'Do you want to talk about the summer when Natalie disappeared? Is that what you're focusing on?'

'Talk about it if you like.'

'I remember your pain, Paul. I remember watching your humiliation by Natalie and wondering what to do about it and...'

'What are you going on about?' said Paul sharply, and Bella clicked off the tape recorder and laid down her pen. 'What do you think you're doing, Jane?'

'What do you mean?'

'Don't play the innocent with me like that. You know, what I mean. You're deliberately destroying the memory, aren't you? Well, aren't you?'

'No,' I replied. I pushed away my plate, sipped some more wine and lit a cigarette. I felt a bit more in control now, not so seduced by the gentle golden light of my imagined past. 'Are you going to ignore your crush on Natalie and her cruelty towards you? It was complicated, wasn't it? There was you and Natalie, and then Natalie and Luke, and me and Theo, and then me and Claud, and there were the twins who were so odd really, playing silly jokes, and there was Alan f.u.c.king girls while Martha cooked our meals and put plasters on our knees, and there was Mum being unhappy, and who knows what Dad felt about the whole thing?

'And then I remember' I couldn't stop now, words were spilling out of me 'I remember that when I was sixteen and you were eighteen, Natalie disappeared. You see this as the end of our innocence. It may be good television. Do you really believe it?'

At some point, Paul had switched on the recorder again. I could see that he was torn between personal confusion and professional interest. I was delivering the goods, all right. Then I said something terrible. The words were out of my mouth, and lying between us like a sword, before I'd even thought them: 'When did you you last see Natalie, Paul?' last see Natalie, Paul?'

To my surprise, Paul didn't react with hostility. He looked at me for a few seconds, considering me, and then rolled a pellet of bread between his fingers, before leaning towards the recorder and speaking directly into it: 'I can't remember. It was a long time ago.'

We had coffee and Bella and I smoked another cigarette: Paul sat between two bluish clouds of smoke and asked me other questions, but the real interview was over. Soon I put on my leather jacket, kissed Paul on the cheek, nodded at Bella and left. London was grey and shabby in the wet wind, and bits of paper lay over the pavements. A woman and her child asked me for money and I gave them five pounds and she asked me for ten. Wretched world.

Thirteen.

'There's a little bit of Alan that's enjoying all of this.'

I was cooking supper for Kim, who'd arrived from her surgery looking exhausted and clutching two bottles of wine and some squishy packets of cheese. The potatoes were mashed, a green salad was prepared, there were fresh flowers on the table: I had someone to cook for. Kim had taken off her shoes and was padding round the kitchen in a dazed fashion, lifting up pan lids, peering into my fridge. I'd been to the supermarket on my way home from work and the fridge was satisfyingly full: tomatoes that looked suspiciously off-red, fennel bulbs, some lettuce with a funny name, a slab of Parmesan, tubs of yoghurt, fresh pasta, a packet of smoked salmon. I had resolved to be good. No more of those dinners that only had to be lit and inhaled. Most mornings, I went swimming on my way into work; most evenings, I prepared myself a proper meal.

'How do you mean?'

She pulled a cork and poured us a gla.s.s of wine each. I took a gulp, then threw some chopped onions into a pan and started to pull the snotty slime out of a squid with my finger.

'Well, I suppose he's devastated. But did you see that interview in the Guardian? Guardian? Honestly! And Paul just rang me and told me that he's just been photographed for one of the women's mags. They're doing a big feature on famous people whose children have died.' Honestly! And Paul just rang me and told me that he's just been photographed for one of the women's mags. They're doing a big feature on famous people whose children have died.'

'There are no problems,' said Kim sardonically, 'only opportunities.'

'That's what you tell your patients, is it? Then the biggest opportunity of all is this thing at the ICA tomorrow evening, part of their "Angry Old Men" season; Alan Martello in conversation with Lizzie Judd. You know, the academic who made her name with that book called Sitting Uncomfortably, Sitting Uncomfortably, that attack on C. S. Lewis and Roald Dahl and other children's writers that got into the newspapers. She's a carnivore.' that attack on C. S. Lewis and Roald Dahl and other children's writers that got into the newspapers. She's a carnivore.'

'Are you going along?'

'Of course. It's like a bullfight, isn't it? People say you should see at least one in your life. I don't know whether Alan will be in his chivalrous gentleman mode or his shocking truth-teller mode, but both will be disastrous.'

'Don't worry, Jane, people will have a good time. It'll be like a modern version of bear baiting, just the sort of thing Alan enjoys.'

'It won't be much fun for the daughter-in-law of the bear.'

Kim had met a man, I learnt over squid. His name was Andreas. He was six years younger than her and a musician. He was small and handsome and sentimental, and their first date had lasted for an entire weekend, broken off only when Kim had been called out of bed to make home visits. I'd always envied Kim's s.e.x life; the variety, the excitement, the sheer numbers. One of her more interesting qualities as a friend was her willingness to talk about what she actually did in bed with these men. I had always had so little with which to reciprocate. I ventured a feeble question about whether it might turn out to be serious and she waved me away as she always did.

'Do you miss Claud?' she asked over cheese.

What could I say? I knew that Kim wouldn't hold my confusion against me.

'I miss a bit of my life, but, then again, I wanted to be free of that old intimacy. Maybe I'm a bit scared by what I've done but I'm excited as well somehow.' I paused to gather my thoughts. 'I feel that something huge is going on in my life, but that I'm in the wrong place at the moment. I almost wish I could tag along with the police, be involved. I feel like I've got to do something to find out how Natalie died. I need to know what happened.'

'But it must have been that old boyfriend, mustn't it?'

'You mean Luke?'

'Yes, and the police have got him.'

'They're talking to him.'

'There you are then. Luke got her pregnant, they had some row, he killed her, maybe by mistake. And buried her.'

'In Alan's and Martha's garden. Right by the house.'

'People don't do logical things when they've killed somebody. Did I ever tell you about the patient of mine who killed his wife? He dismembered the body and sent the bits off to branches of Barclays Bank all over the world.'

'That sounds quite clever.'

'Except that he put his address on the customs declaration.'

'Why?'

'His psychiatrist said that he wanted to be caught.'

'Is that story true?'

'Of course it is. Anyway, I don't see that the improbability lets Luke off the hook any more than anybody else. Somebody must have buried her there.'