Six Letters and Postcards from Nazi Concentration and Labor Camps - Auschwitz (Monowitz), Dachau, Sachsenhausen ...

Six Letters and Postcards from Nazi Concentration and Labor Camps - Auschwitz (Monowitz), Dachau, Sachsenhausen, Liegnitz-Mauthausen, Klettendorf-Reichsautobahn
A. Auschwitz 3 – Monowitz.
On the postage stamp (with the figure of Hitler), a postmark: "Auschwitz – Upper Silesia 21.11.42". The letter is from 15.11.1942.
An additional stamp: "Auschwitz 3" – which is th eMonowitz camp that operated as a labor camp for the IG Farben Company.
On the envelope, standard rules for handling the letters of the prisoners. For example, "letters of prisoners should be clearly written in ink with 15 words only on one side", "requests for release [by the prisoners] … are useless" and "prisoners are forbidden to receive packages since they can buy everything at the camp"
The letter was sent by the prisoner to his family in Bohemia.
B. Two postcards with the inscriptions of both Klettendorf (near Breslau) and R.A.B. (Reichsautobahn) – testimony of the prisoners of Klettendorf, most of them Jews, being made to pave the highway from Breslau to Berlin.
One postcard with the postmark 12.1.45. the postcard was written on 18.12.44 and was sent to Dr. Ludmila of Prage by her husband, who was a prisoner of Klettendorf.
On the reverse side, typical Nazi propaganda: "The Fuhrer knows only warfare, work and concern. We want to take from him what we can".
Another postcard with a postmark: Reischenbach Faulbruck, 27.11.44. The letter from 26.11.44 was by a prisoner of the Gross-Rosen camp to a prisoner of the above camps (most likely, her husband).
C. Postcard from Sachsenhausen
On the postcard, the postmark of the mail division of the Sachsenhausen camp. Th epostcard was written on 20.10.40 by Johan to his wife and children in Lublin, Poland: "Finally after five weeks of expectation I have received your postcard … Why don't you write more often? Every week I look forward to receiving your postcard…" The writer was most likely not Jewish, since the Jews of the camp did not ask to be written more often…
D. Letter from Dachau
Stamp of Dachau 7.2.45. The letter was written on 3.2.45 to Mrs. Anna Chlumska by her husband Carl. "My dear wife, I send my warm regards/ I am healthy and think about you. Why don't you write? Since 22.11.44 I haven't received any notice from you …" Here too the writer is most likely not Jewish.
E. Postcard sent to the Liegnitz-Mauthausen camp
Postmark 28.8.44 [?]. Green stamp [Mauthausen]. The postcard is from 25.8.44. on its reverse side, a photograph of Mount Simonyhütte in the Austrian Alps. The postcard was sent from Dachstein, Austria to the Linz/Donau camp.
F. Postcard sent from Liegnitz in Silesia. Polish.
Sent to Altkesse bei firma otto Schroder – most likely a labor camp that operated near the factory.
G. Envelope with a Hitler postage stamp and postmark 9.5.44. Stamp: Dresden ma[?].
Sent by Jaroslaw Robowsky to his wife Mary.