He gave an amused sort of sniff. ‘The ability to talk as toughly as your fictional counterpart is one thing, Herr Gunther,’ he said. ‘Being it is quite another. Your remarks demonstrate either an astonishing lack of appreciation as to the gravity of your situation, or real courage.’ He raised his thin, gold-leaf eyebrows and started to toy with the German Horseman’s Badge on his left breast-pocket. ‘By nature I am a cynical man. I think that all policemen are, don’t you? So normally I would be inclined to favour the first assessment of your bravado. However, in this particular case it suits me to believe in the strength of your character. Please do not disappoint me by saying something really stupid.’ He paused for a moment. ‘I’m sending you to a KZ.’

My flesh turned as cold as a butcher’s shop-window. I finished what was left of my schnapps, and then heard myself say: ‘Listen, if it’s about that lousy milk bill . . .’

They both started grinning a lot, enjoying my obvious discomfort.

‘Dachau,’ said the colonel. I stubbed out my cigarette and lit another. They saw my hand shake as I held the match up.

‘Don’t worry,’ said the general. ‘You’ll be working for me.’ He came round the desk and sat on its edge in front of me.

‘And who are you?’

‘I am Obergruppenführer Heydrich.’ He waved his arm at the colonel and folded his arms. ‘And this is Standartenführer Sohst of Alarm Command.’

‘Pleased to meet you, I’m sure.’ I wasn’t. Alarm Command were the special Gestapo killers that Marlene Sahm had talked about.

‘I’ve had my eye on you for some time,’ he said. ‘And after that unfortunate little incident at the beach house in Wannsee I have had you under constant observation, in the hope that you might lead us to certain papers. I’m sure you know the ones I mean. Instead you gave us the next best thing - the man who planned their theft. Over the past few days, while you’ve been our guest, we’ve been checking your story. It was the autobahn worker, Bock, who told us where to look for this Kurt Mutschmann fellow - the safecracker who now has the papers.’

‘Bock?’ I shook my head. ‘I don’t believe it. He wasn’t the sort to turn informer about a friend.’

‘It’s quite true, I can assure you. Oh, I don’t mean he told us exactly where to find him, but he put us on the right track, before he died.’

‘You tortured him?’