‘Walther PPK, 9 mm,’ said Martins, lighting a cigarette. ‘Just like the gun that killed poor Herr Pfarr and his wife.’

‘That’s not what I heard.’ I went over to the drinks cabinet. I was surprised to see that they hadn’t helped themselves to any of my whisky.

‘Of course,’ said Dietz, ‘we were forgetting that you’ve still got friends over at the Alex, weren’t we.’ I poured myself a drink. A little too much to swallow in less than three gulps.

‘I thought they got rid of all those reactionaries,’ said Martins. I surveyed the last mouthful of whisky.

‘I’d offer you boys a drink, only I wouldn’t want to have to throw away the glasses afterwards.’ I tossed the drink back.

Martins flicked away his cigarette and, clenching his fists, he stepped forward a couple of paces. ‘This bum specializes in lip like a yid does in nose,’ he snarled. Dietz stayed where he was, leaning on the window. But when he turned around there was tabasco in his eyes.

‘I’m running out of patience with you, mulemouth.’

‘I don’t get it,’ I said. ‘You’ve seen the letter from the Assurance people. If you think it’s a fake, then check it out.’

‘We already did.’

‘Then why the double act?’ Dietz walked over and looked me up and down like I was shit on his shoe. Then he picked up my last bottle of good scotch, weighed it in his hand and threw it against the wall above the desk. It smashed with the sound of a canteen of cutlery dropping down a stairwell, and the air was suddenly redolent with alcohol. Dietz straightened his jacket after the exertion.

‘We just wanted to impress you with the need to keep us informed of what you’re doing, Gunther. If you find out anything, and I mean anything, then you better speak to us. Because if I find out you’ve been giving us any fig-leaf, then I’ll have you in a KZ so quick, your fucking ears will whistle.’ He leaned towards me and I caught the smell of his sweat. ‘Understand, mulemouth?’

‘Don’t stick your jaw too far out, Dietz,’ I said, ‘or I’ll feel obliged to slap it.’

He smiled. ‘I’d like that sometime. Really I would.’ He turned to his partner. ‘Come on,’ he said. ‘Let’s get out of here before I kick him in the eggs.’

I’d just finished clearing up the mess when the phone rang. It was Müller from the Berliner Morgenpost to say that he was sorry, but beyond the sort of material that the obituaries people collected over the years, there really wasn’t much in the files about Hermann Six to interest me.