Confederacy, Danville Prison, Building #4, Danville, Va., small 1864 folded letter to Waterboro P.O. in Ohio, across the lines with "Old Point Comfort, Va., Apr 19" cds and matching straight line "Due 3" handstamp, endorsed "Prisoner Letter" at left, letter datelined "Danville, Va., March the 21, 1864" with sending address "Danville, Va., Prison No.4, Via Fortress Monroe", Very Fine and choice, ex-Walske. Estimate  $1,500 - 2,000. AN EXTREMELY RARE USAGE FROM DANVILLE PRISON #4, ONLY FIVE SUCH COVERS FROM THIS PRISON KNOWN. This is pictured in Harrison's Prisoners' Mail From The American Civil War on page 74. $0 (Image)