Confederacy, Camp Nelson, Ky. U.S. 1861 3¢ rose tied on lemon cover to Rhode Island, thought to be from a guard at Camp Nelson, reduced at left, F.-V.F., very rare as no prisoner's covers are known and only one other guard cover, with detailed analysis. Scott No. U.S. 65  Estimate $750 - 1,000. $0 (Image)