'I noticed it,' I said. I took it from its leather holster. It was a Webley Mark VI, a gigantic revolver that weighed about two and a half pounds, the sort of weapon that the British Army had been hanging on its officers since the First World War. It was blue and perfect, I doubt if my father had ever fired it. There was a box of ammunition too. Nickel jacket.455 inch rounds 'for service use'. The label was dated 1943 and the seal was unbroken.

'That's everything. Klara made sure that all your father's things were packed in his case. So that's all apart from the footstool, the mattress and the set of Dickens.'

'Thank you, Lisl.'

'The end of an era,' she mused sadly. 'Werner taking over the hotel. The changes to the rooms. You taking your father's things. I'm a stranger here now, a stranger in my own home.'

'Don't be silly, Lisl. Werner loves you. He's only done it all for you.'

'He's a good boy,' she said sadly, not grudging him her affection but reluctant to abandon the self-pity she so relished.

There was a sudden increase in the noise of the party as Werner came in and shut the door behind him. Werner was dressed as a knight in full armour. Expediently the armour was fashioned entirely of fabric cunningly embroidered with gold and silver wire to reproduce the intricate decoration on etched and gilt metal. He looked magnificent, even Lisl thought so. Lisl looked equally splendid in a long brightly patterned dress that – acording to the rental company's label – was that of a thirteenth-century noblewoman, and was based upon the stained glass figures of Augsburg Cathedral. It included diadem and wimple and a light but voluminous cloak. Whatever the integrity of the design she made a fine figure alongside Werner, the wheelchair providing her with an imposing throne. I thought he might have chosen his costume and hers with filial congruity in mind but he later confided that it was the only garment he could find in her size that was also bright crimson. Lisl loved vivid colours.

'It's a madhouse out there,' said Werner as he stood against the door and caught his breath. His face was pink with excitement and exertion. 'I brought you some more champagne.' He had the bottle in his hand and he poured some for both of us. 'Absolutely ghastly.'

'It sounds ghastly,' I said, although I had long grown used to the way in which Werner organized this sort of frenzied fancy dress party, and then went around all evening saying how much he hated it.

He looked at me. 'I wish you'd put on your costume,' he said. He'd selected an amazing mid-nineteenth-century costume for me that was called 'the Biedermeier gentleman' on the box. It came complete with a frock coat and high hat. I suspected that Werner had chosen it with a certain sardonic glee that I had no intention of sustaining.

'I'm all right like this,' I said. I was wearing a battered grey suit, my only concession to the party being one of Werner's more colourful bow ties.

'You're so bloody English,' said Werner, not unkindly.

'Sometimes I am,' I admitted.

'There must be a hundred and fifty people out there,' he told me. 'Half of them gatecrashers. The word got around I suppose; they're all in costume.' It was typical of him that he should show a trace of pride that so many should want to gatecrash his party. 'Do you want the Duchess to tell your fortune, Lisl?'

'No, I don't, ' said Lisl.

'They say she's a witch,' said Werner as if that was a recommendation.

'I don't want to know the future,' said Lisl. 'When you get to my age the future holds nothing but heartbreak and pain.'

'Don't be a misery, Lisl,' said Werner, who dared to go much further with her than I would ever do. 'I'm going to make sure you meet people.'

'Go away!' said Lisl. 'I'm talking to Bernd.'

Werner looked at me and gave a tiny grin. 'I'll be back,' he promised and returned to the party which was getting louder every minute. He stood in the open doorway for long enough for me to see the crowded dance floor. There was a frenzied crowd of dancers all elaborately costumed – Germans take fancy dress parties as seriously as they take every other social activity from opera-going to getting drunk – and waving their arms in the air more or less in tune with the music. Sequined chorus girls, a Roman Senator, Karl May's Old Shatterhand and two squaws danced past wriggling and smiling. Jeremy Teacher – dressed as a thin elegant curly-haired gorilla – was dancing with Tessa, who was in a long diaphanous yellow dress with long antenna bobbing above her head. Teacher was holding her tight and talking: Tessa was wide-eyed and nodding energetically. It seemed an unlikely combination. The door closed.

'What time will they go home?' Lisl asked me.

'It won't go on very late, Lisl,' I promised, knowing full well that it would go on very late indeed.

'I hate parties,' said Lisl.

'Yes,' I said, although I could see she had already decided to go and circulate. She preferred to be pushed round in her wheelchair. It gave her an added sense of majesty. I supposed I'd have to do it but I knew she'd find a way of making me look a bloody fool while doing so.

I locked up the suitcase. 'Come on, Lisl,' I said. 'Let's go and look round.'

'Must we?' she said, and was already looking in the mirror to inspect her make-up. Then the door opened again. There was a short smiling man standing there.

At first I thought he was in a specially elaborate costume that included face-black. Then I recognized Johnny the Tamil. He looked different; he was wearing gold-rimmed glasses. He laughed. 'How wonderful!' he said. 'How wonderful!' I thought he must be referring to the party but he seemed almost not to notice that the party was going on at all. Perhaps he was stoned. 'Wonderful to find you, Bernard,' he said. 'I've looked all over town.'

'I heard the cops got you,' I said.

He looked at me over his glasses. 'I was lucky. There was the cruise missiles demonstration. Three hundred arrests. They needed the space in the cells. They threw me out.' His German had not improved but I'd got used to his accent.

'I'll get you a drink,' I offered. Behind him, through the open door I spotted the Duke of Wellington holding tight to a rather gorgeous geisha. For a fleeting moment I thought it was Daphne Cruyer, but as she turned her head and smiled at Frank I knew it wasn't.

'No. I must go. I brought this for you.' He gave me a large dog-eared envelope. I opened it. There was a plastic box that looked a bit like a small radio. 'It's Spengler's…' said Johnny. 'He wanted you to have it. It's his chess computer.'

'Thanks.'

'He always said that if anything happened to him I could have his glasses and you could have his computer. That's all he had,' Johnny added unnecessarily. 'The cops took his passport.'

'For me? Are you sure?'

'I'm sure. Spengler liked you. I put new batteries in.'

'Thanks, Johnny. Do the glasses suit you?' He looked quite different in the glasses.

'No, they make everything blurred. But they are stylish, aren't they?'

'Yes, they are,' I said. 'This is Tante Lisl. Have a drink?'

'Hello, Tante Lisl,' He seemed baffled at the idea that Lisl might really be my aunt but he didn't question it. 'No. I must go, Bernard.'

'Did they find out who killed Spengler?' I asked.

'They haven't even found out his real name or where he came from. No one cares about him, except us.'

He waved and was gone. Lisl had made no attempt to follow the conversation. 'You should be careful who you mix with in this town,' she said. 'It's not like London.'

Lisl, who, as far as I knew, had never been to London, had been saying that to me since I was six years old, and brought Axel Mauser back to see my Nazi medal collection.

Johnny's visit was over so quickly that I forgot to give him some cash. With people like Johnny a few marks go a long way. Goodness knows what time and trouble he'd spent in tracking me down. He'd even stolen new batteries for me: long-life batteries, the very best. I suppose he got them from Wertheim. He liked stealing from Wertheim: he said it was a quality shop.