Dachau 3K, 28 April 1943
To the Commander of the Sachsenhausen Concentration Camp,
SS Obersturmbannfuehrer Keindl
Sachsenhausen, near Oranienburg
Obersturmbannfuehrer!
By order of the Reich Leader SS, I have been conducting freezing experiments on human beings in the Dachau concentration camp for more than a year. Today I learned from an experimental subject that I was not the only one conducting these experiments, but that, on the contrary, already in October and November 1938, similar experiments were conducted in the Sachsenhausen concentration camp. SS Hauptsturmfuehrer Dr. Samenstrang is said to have frozen experimental subjects—that is prisoners—in cold water, and subsequently revived them by means of warm water or hot compresses. As I was to work out and have worked out a prescription for the Waffen SS for the resuscitation of frozen persons (for the campaign in the East), knowledge of all preliminary experiments in my field of work is of great importance for me.
I therefore request that if possible you let me know what kind of experiments were conducted in your camp, and, if possible, what results were obtained in connection with these experiments.
As you might not know anything about me, please make inquiries about me, if necessary, either at the Personal Staff of the Reich Leader SS (Obersturmbannfuehrer Baumert) or from the Commander of the Dachau concentration camp, SS Sturmbannfuehrer Weiss.
Yours sincerely
Heil Hitler!