It was late, gone one o’clock, when finally I drove back to my apartment in Trautenaustrasse, which is in Wilmersdorf, a modest neighbourhood, but still a lot better than Wedding, the district of Berlin in which I grew up. The street itself runs north-east from Guntzelstrasse past Nikolsburger Platz, where there is a scenic sort of fountain in the middle of the square. I lived, not uncomfortably, at the Prager Platz end.

Ashamed of myself for having teased Buerckel in front of Dagmarr, and for the liberties I had taken with Carola the stocking-buyer in the Tiergarten near the goldfish pond, I sat in my car and smoked a cigarette thoughtfully. I had to admit to myself that I had been more affected by Dagmarr’s wedding than previously I would have thought possible. I could see there was nothing to be gained by brooding about it. I didn’t think that I could forget her, but it was a safe bet that I could find lots of ways to take my mind off her.

It was only when I got out of the car that I noticed the large dark-blue Mercedes convertible parked about twenty metres down the street, and the two men who were leaning on it, waiting for someone. I braced myself as one of the men threw away his cigarette and walked quickly towards me. As he drew nearer I could see that he was too well-groomed to be Gestapo and that the other one was wearing a chauffeur’s uniform, although he would have looked a lot more comfortable in a leopard-skin leotard, with his music-hall weightlifter’s build. His less than discreet presence lent the well-dressed and younger man an obvious confidence.

‘Herr Gunther? Are you Herr Bernhard Gunther?’ He stopped in front of me and I shot him my toughest look, the sort that would make a bear blink: I don’t care for people who solicit me outside my house at one in the morning.

‘I’m his brother. He’s out of town right now.’ The man smiled broadly. He didn’t buy that.

‘Herr Gunther, the private investigator? My employer would like a word with you.’ He pointed at the big Mercedes. ‘He’s waiting in the car. I spoke to the concierge and she told me that you were expected back this evening. That was three hours ago, so you can see we’ve been waiting quite some time. It really is very urgent.’

I lifted my wrist and flicked my eyes at my watch.

‘Friend, it’s 1.40 in the morning, so whatever it is you’re selling, I’m not interested. I’m tired and I’m drunk and I want to go to bed. I’ve got an office on Alexanderplatz, so do me a favour and leave it till tomorrow.’