Keywords: Civil War-POW2-South-North.jpg en POW letter bearing no Confederate inspection marks probably carried by prisoner exchange soldier to transfer point US postmark From Federal Gov public domain <br/>Prisoner of war letter from south to north no stamp Prisoner of war letter no stamp US Post mark 1863 PD-old-100 PD-USGov en wikipedia Postage_stamps_and_postal_history_of_the_Confederate_States Confederate States of America Stamps of the United States 7 Prisoner of war mail Historic sites in the United States Former prisons in the United States Confederate States of America Stampless covers of the United States Military bases Postal history of the American Civil War |