cover 1850 Archer perf. 16, 1d. plate 97, TD, on envelope addressed to "C.J. Balut Esq., 2 Bloomsbury Place" and showing manuscript "Rt. Hble W.E. Gladstone M.P., April 11 51" at top left, the adhesive with London District Post "53" cancellation, blue straight-line "Pall Mall" on reverse; seal on reverse cut-away and traces of soiling on address panel but still fine and attractive. S.G. 16b. Photo