cover 1871 (8 Sept.) entire letter to Boston, USA, marked "via Italy", bearing 1865-73 4d. Pl.12 and 1867-73 3d. Pl.6 (2), all clearly cancelled by "A25" duplex, showing "2/CENTS" accountancy h.s. and London Paid transit c.d.s., both in red. A most attractive franking illustrating the 10d. rate to USA. Photo