This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
monochrome Lot WWI Prisoners of War. Censoring prisoners mail Doeberitz September . George C. Bain Collection. Courtesy of the Library of Congress also at LOC as LCB. Lot WWI Prisoners of War. Censoring prisoners mail Doeberitz September . George C. Bain Collection. Courtesy of the Library of Congress also at LOC as LCB.