(Prisoner of War Usages) Fort Warren, Boston Harbor Mass., civilian prisoner cover bearing 1¢ blue (63) pair and single, tied by "Paid" framed cancels on cover to Baltimore Md., red "Boston Mass Aug 8" cds, endorsed "Fort Warren, Aug 7th 1862" at top left, this cover was sent by S. Teakley Wallis, a political prisoner to his wife, Very Fine; with 1985 P.F. certificate, signed on reverse by Brian Green. Estimate  $500 - 750. Fort Warren was one of the better run Civil War prisons with a much lower casualty rate than most others during that time. S. Teackley Wallis was a member of the Maryland House of Delegates from Baltimore, has as a common roommate at Fort Warren another Baltimore legislator, Henry M. Warfield. During their imprisonment they made a pact that each would name a child after the other. Warfield's granddaughter, Wallis, later became the Duchess of Windsor through her marriage to the abdicated English King Edward VIII. $0 (Image)