An official Nazi document dated 10 December 1941, one of the few 14f13 papers to survive, contains instructions to SS commandants about how and when selections for gassings are to proceed. It is addressed to the commandants at Dachau, Sachsenhausen, Buchenwald, Mauthausen, Auschwitz, Flossenbürg, Gross-Rosen, Neuengamme and Niederhagen. The letter states that ‘medical commissioners will shortly visit the above-named camps for the purpose of examining prisoners’; further visits would take place during the first half of January 1942.
