cover 1897 envelope from London (14.5) to Shanghai (15.6 Local P.O. arrival) via Hong Kong (9.6) bearing G.B. 2½d. cancelled by c.d.s. and Postage Due ½c. vertical pair applied on arrival and cancelled by barred circle h.s., showing framed "TO PAY" h.s. adjacent. A marvelous incoming Due cover. Photo