Castle Morgan, Cahaba Ala.
Inner prisoner-of-war cover to New Corwin O., with original letter datelined "Cahaba Alibama (sic) February 11th 65",
endorsed "Prisoners Letter",
censored on back by Cahaba Commander
Capt. Howard Andrew Millett Henderson "Exd. H.A.M. Henderson Capt. & Asst Agh of Exchange, C.S.A.",
"Vicksburg Miss. Mar. 9, 186(5)" double-circle datestamp and "Due 6" handstamp for U.S. unpaid rate, contemporary ink staining on both sides, Fine and rare, the U.S. capture of Vicksburg in July 1863 placed U.S. and C.S.A. forces in close proximity, Vicksburg was designated by the U.S. as a principal exchange point in the West, but flag-of-truce mail through that point is surprisingly rare, approximately 10 covers are known from Castle Morgan, illustrated in Special Routes
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