cover 1815 E.L. (3) from London to Madeira, directed "p. Cumbrian", "p. Apollo" or "p. Alnwick Packet", prepaid at 10d. (two) or "1 oz. 3/4", and each showing (across the flap) large d.s. "POST PAID WITHDRAWN SHIP LETTER/LONDON" (PPWSL, L. 1322), poor to good strikes in black