Confederacy, Camp Sorghum, Columbia, S.C. 1863 10¢ blue, huge upper left sheet margin copy, tied by neat "Old Point Comfort, Va Dec 16" (1864) double circle and large "Due 6" in circle on Southern Prisoner of War Cover to Newburyport, Mass. with manuscript examined marking "Exd J.C. Martin, Capt Comdg" (of Camp Sorghum, used from Nov '64 to Jan '65) and soldier endorsement of "Henry W.Cross Lieut 59th Mass Inf'y Vols., Prisoner of War Columbia, S.C."; backflap replaced, otherwise Extremely Fine, amid the finest known Prisoner of War covers in existence, one of only 20 covers known from this rare Southern prison, ex-Haas.; with 1982 C.S.A. & 2008 P.F. certificates. Scott No. 12  Estimate $2,000 - 3,000. $0 (Image)