Confederacy, Danville Prison, Building #3, Danville, Va. Prisoner cover to Philadelphia, Pa., franked with U.S. 1861, 3¢ rose tied by quarter cork with "Old Point Comfort, Va., Jul 24" cds alongside, prisoner of war endorsement at left, with original enclosure datelined Danville, Va., May 14/64 with message of capture…We are confined in a Large Tobacco Warehouse and "Prison No. 3" address; owners handstamp on letter and cover with backflap missing, otherwise Very Fine, a very rare Danville Prison prisoner of war usage, only 2 recorded usages from Building #3 in Harrison. Scott No. U.S. 65  Estimate $1,500 - 2,000. $0 (Image)