Confederacy, Charleston Jail. "Port Royal, S.C. Sep 27" (1864) double circle postmark with two strikes of straightline "Due 3" handstamps on prisoner of war cover to Ohio, cover with manuscript "Prisoners letter for Flag of Truce B.F. Blair, Lt 123 O.V.I." at left & manuscript censor's "Exd" examined marking at top right, included is original letter headed "Charleston Jail, Charleston, S.C. Sept 14" saying he is sick but not deathly so and expects to be transferred to a different prison (he went to Columbia), original side flap (reattached & opened to display) signed "Lt. Col. Woodford, Agent of exchange", Very Fine; with 2008 C.S.A. certificate. Estimate  $750 - 1,000. Rare and wonderful example of Southern Prisoner of War Cover of which only 8 are recorded from Charleston City Jail. $0 (Image)