1842 (18 Jan.) lettersheet (with disinfection slits) from Smyrna (French P.O. cds) to Naples (18 Feb.) showing a very fine strike of the postage due handstamp "29 Jan 1 d" (DC-1) on reverse, with fine "Malta Post Office" (MPO-1a) and Malta Lazaret (LAZ-C3) handstamps on front