Walking in there after snatching a few hours of sleep back at my apartment, and presented with the sight of Hans Illmann waiting patiently for me with a dossier of photographs, I didn’t think that the place was about to get any more pleasant. Congratulating myself on having had the foresight to eat something before what promised to be an unappetizing meeting, I sat down and faced him.

‘So this is where they’ve been hiding you,’ he said.

‘It’s supposed to be only temporary,’ I explained, ‘just like me. But frankly, it suits me to be out of the way of the rest of Kripo. There’s less chance of becoming a permanent fixture here again. And I dare say that suits them too.’

‘One would not have thought it possible to cause such aggravation throughout Kripo Executive from such a bureaucratic dungeon as this.’ He laughed, and stroking his chin-beard added: ‘You, and a Sturmbannfuhrer from the Gestapo, have caused all sorts of problems for poor Dr Schade. He’s had telephone calls from lots of important people. Nebe, Muller, even Heydrich. How very satisfying for you. No, don’t shrug modestly like that. You have my admiration, Bernie, you really do.’

I pulled open a drawer in my desk and took out a bottle and a couple of glasses.

‘Let’s drink to it,’ I said.

‘Gladly. I could use one after the day I’ve had.’ He picked up the full glass and sipped it gratefully. ‘You know, I had no idea that there was a special department in the Gestapo to persecute Catholics.’

‘Nor had I. But I can’t say that it surprises me much. National Socialism permits only one kind of organized belief.’ I nodded at the dossier on Illmann’s lap. ‘So what have you got?’

‘Victim number five is what we have got.’ He handed me the dossier and started to roll himself a cigarette.

‘These are good,’ I said flicking through its contents. ‘Your man takes a nice photograph.’

‘Yes, I thought you’d appreciate them. That one of the throat is particularly interesting. The right carotid artery is almost completely severed thanks to one perfectly horizontal knife cut. That means that she was flat on her back when he cut her. All the same, the greater part of the wound is on the right-hand side of the throat, so in all probability our man is right-handed.’

‘It must have been some knife,’ I said, observing the depth of the wound.

‘Yes. It severed the larynx almost completely.’ He licked his cigarette paper. ‘Something extremely sharp, like a surgical curette I should say. At the same time, however, the epiglottis was strongly compressed, and between that and the oesophagus on the right were haematomas as big as an orange pip.’

‘Strangled, right?’

‘Very good,’ Illmann grinned. ‘But half-strangled, in actual fact. There was a small quantity of blood in the girl’s partially inflated lungs.’