cover 1841 (11 Mar.) entire letter from Gosport to Malta, marked "Par le paquebot de la Mediterranee", charged "2.8½" in red, showing fine "27 Mar Free" h.s. (DC-Fa) with month error "Mnr" for "Mar", and oval-framed "P-D" struck over Paid d.s., both in red. Believed to be the only recorded example of this error. Photo