Concentration Camps Correspondence
In this letter Thadaus asks for a quick response and says he doesn't know when he will be able to be with his parents and sister again.
In his database, Lordahl lists a letter from the inmate (16 February 1941) and a much later letter (8 October 1944). It seems that this inmate spent most of the war in Dachau. Since there are no envelopes, the recipient is unknown.