He was a Dutch Jew and I knew him as Hans. With that simple exchange between the two of us I had given away the protection of the Geneva Convention: I’d given my uniform, my lifeline, my best chance of surviving that dreadful place, to another man. From now on, wearing his clothes, I would be treated the way he had been treated. If I was caught, the guards would have shot me out of hand as an imposter. No question at all. It was the middle of 1944 when I entered Auschwitz III of my own free will.

