Chapter 7.
I spent a few days in Berlin, carrying in my briefcase documents of great military interest to the Allies. I met twice with Dr. Sigmund Herzer, a physicist working at the Krupp factories. Herzer was a friend of my father's (who died in '38 from a cerebral hemorrhage). Herzer is engaged at present in military security and national anti–aircraft defence. He handed over to me miniaturized photocopies of calculations and plans. He told me of the prodigious advances made in the field of technical warfare, drew sketches which I forward to the British Secret Service whenever there is a safe line of communication.
I transmit what is transmissible, but for sketches and plans I need to make personal contacts. In Paris I mainly used couriers. Here I can't. I have to rely on spies dropped
