I smiled sheepishly, like the idiot I imagined Manstein to be. ‘Thanks very much,’ I said, and muttered something about having left my key in my office. The cleaning woman hovered a little and then released the door to me. I stepped inside the building and let it go. It closed behind me, and I heard the loud click of the cylinder lock as the bolt hit the chamber.

Two double doors with porthole windows led into a long, brightly lit corridor that was lined with stacks of cardboard boxes. At the far end was a lift, but there was no way of using it without alerting the guard. So I sat down on the stairs and removed my shoes and socks, putting them on again in reverse order, with the socks over the shoes. It’s an old trick, favoured by burglars, for muffling the sound of shoe-leather on a hard surface. I stood up and began the long climb.

By the time I got to the eighth floor my heart was pounding with the effort of the climb and having to breathe quietly. I waited at the edge of the stairs, but there was no sound from any of the offices next to Jeschonnek’s. I shone the flash at both ends of the corridor, and then walked down to his door. Kneeling down I looked for some wires that might give a clue to there being an alarm, but there were none; I tried first one key, and then the other. The second one was almost turning, so I pulled it out and smoothed the points with a small file. I tried again, this time successfully. I opened the door and went in, locking it behind me in case the security guard decided to do his rounds. I pointed the flash onto the desk, over the pictures and across to the door to Jeschonnek’s private office. Without the least resistance to the levers, the key turned smoothly in my fingers. Covering the name of my locksmith with mental blessings, I walked over to the window. The neon sign on top of Pschorr Haus cast a red glow over Jeschonnek’s opulent office, so there wasn’t much need for the flash. I turned it off.

I sat down at the desk and started to look for I didn’t know what. The drawers weren’t locked, but they contained little that was of any interest to me. I got quite excited when I found a red leather-bound address book, but I read it all the way through, recognizing just the one name: that of Hermann Goering, only he was care of a Gerhard Von Greis at an address on Derfflingerstrasse. I remembered Weizmann the pawnbroker saying something about Fat Hermann having an agent who sometimes bought precious stones on his behalf, so I copied out Von Greis’s address and put it in my pocket.