Later on, when, with a considerable degree of discomfort, I had been moved by the medical orderlies on to the bunk above, and its previous occupant had been moved below, I looked down over the edge of my pallet at the man who represented my only way out of Dachau. It was not an encouraging sight. From my memory of the photograph in Heydrich’s office, it would have been impossible to identify Mutschmann but for the ganglion, so yellow was his pallor and so wasted his body. He lay shivering under his blanket, delirious with fever, occasionally groaning with pain as cramp racked his insides. I watched him for a while and to my relief he recovered consciousness, but only long enough to try, unsuccessfully, to vomit. Then he was away again. It was clear to me that Mutschmann was dying.

Apart from the doctor, whose name was Mendelssohn, and three or four medical orderlies, who were themselves suffering from a variety of ailments, there were about sixty men and women in the camp hospital. As hospitals went it was little more than a charnel-house. I learned that there were only two kinds of patient: the sick, who always died, and the injured, who sometimes also got sick.

That evening, before it grew dark, Mendelssohn came to inspect my stripes.

‘In the morning I’ll wash your back and put some more salt on,’ he said. Then he glanced disinterestedly down below at Mutschmann.

‘What about him?’ I said. It was a stupid question, and only served to arouse the Jew’s curiosity. His eyes narrowed as he looked at me.

‘Since you ask, I’ve told him to keep off alcohol, spicy food and to get plenty of rest,’ he said drily.

‘I think I get the picture.’

‘I’m not a callous man, my friend, but there is nothing I can do to help him. With a high-protein diet, vitamins, glucose and methionine, he might have had a chance.’

‘How long has he got?’

‘He still manages to recover consciousness from time to time?’ I nodded. Mendelssohn sighed. ‘Difficult to say. But once coma has set in, a matter of a day or so. I don’t even have any morphine to give him. In this clinic death is the usual cure that is available to patients.’

‘I’ll bear it in mind.’

‘Don’t get sick, my friend. There’s typhus here. The minute you find yourself developing a fever, take two spoonfuls of your own urine. It does seem to work.’

‘If I can find a clean spoon, I’ll do just that. Thanks for the tip.’

‘Well, here’s another, since you’re in such a good mood. The only reason that the Camp Committee meets here is because they know the guards won’t come unless they absolutely have to. Contrary to outward appearances, the SS are not stupid. Only a madman would stay here for any longer than he has to.