‘Do you mind my asking what happened to him?’

‘Not at all. He is still in my employment, although occupying a lesser position, as an inland-shipping administrator with the Hermann Goering Works in Cologne.’ Goering repeated his own name without the least trace of hesitation or embarrassment; he must have thought it was the most natural thing in the world that a factory should bear his name.

‘You see,’ he said proudly, ‘I look after the people who have done me a service. Isn’t that so, Rienacker?’

The big man’s answer came back with the speed of a pilota ball. ‘Yes sir, Herr Prime Minister, you most certainly do.’ Full marks, I thought as a servant bearing a large tray of coffee, Moselle and eggs Benedict for the Prime Minister came into the room. Goering tucked in as if he hadn’t eaten all day.

‘I may no longer be head of the Gestapo,’ he said, ‘but there are many in the security police, like Rienacker here, who are still loyal to me, rather than to Himmler.’

‘A great many,’ piped Rienacker loyally.

‘Who keep me informed about what the Gestapo is doing.’ He dabbed daintily at his wide mouth with a napkin. ‘Now then,’ he said. ‘Rienacker tells me that you turned up at my apartment in Derfflingerstrasse this afternoon. It is, as he may already have told you, an apartment that I have placed at the disposal of a man who in certain matters is my confidential agent. His name is, as I believe you know, Gerhard Von Greis, and he has been missing for over a week. Rienacker says that you thought that he might have been approached by someone trying to sell a stolen painting. A Rubens nude, to be precise. What made you think that my agent was worth contacting, and how you managed to track him down to that particular address I have no idea. But you impress me, Herr Gunther.’

‘Thank you very much, Herr Prime Minister.’ Who knows? I thought; with a little practice I could sound just like Rienacker.

‘Your record as a police officer speaks for itself, and I don’t doubt that as a private investigator you are no less competent.’ He finished eating, swallowed a glassful of Moselle and lit an enormous cigar. He showed no signs of weariness, unlike the two aides and Rienacker, and I was starting to wonder what the pink pills had been. He blew a doughnut-sized smoke-ring. ‘Gunther, I want to become your client. I want you to find Gerhard Von Greis, preferably before Sipo does. Not that he’s committed any crime, you understand. It’s just that he is the custodian of some confidential information which I have no wish to see fall into Himmler’s hands.’

‘What kind of confidential information, Herr Prime Minister?’

‘I’m afraid I can’t tell you that.’