cover 1855 (Mar.) XU5 from the Governor of Gibraltar (red wax seal on reverse) to London, showing large h.s. "6" and, on reverse, "GIBRALTAR 6 MR 1855/SHIP LETTER", both in blue, the latter partly overstruck by boxed "LIVERPOOL/SHIP" d.s. in green; the XU5 rather creased and soiled. Scarce. Photo