In late 1944 or early 1945, Karl Lill — a Czech Communist who, with Langbein, served as Wirths’s prisoner secretary [at Auschwitz] — sent a note to Eduard Wirths asking the chief doctor to prevent a Nazi plan (that Lill and others had heard of originating in the Political Department) to kill all prisoners. In another letter Lill told how, at their last meeting, Wirths urged him “with tearful eyes” to join the prisoners’ evacuation because he was convinced that should Lill remain in Auschwitz the Russians would kill him."
- Robert Lifton, Nazi doctors (pp. 390-391)