GENERAL HOSPITAL #21, RICHMOND, VA.: prisoner of war cover from Lt. Joseph P. Rockwell, 18th Connecticut Infantry to Mrs. John Rockwell, Norwich, Conn., franked with US 65, 3¢ rose tied with target cancel alongside an OLD POINT COMFORT VA. JUL 4 double-circle postmark, manuscript "Ex J.M.H." (John M. Higgins, a clerk at the CSA War Department) censor's initials, Very Fine and rare. Ex Galen Harrison. ONLY 5 COVERS RECORDED BY HARRISON. $1,000.