T HELENA" oval d.s. in violet; small stain at left, otherwise fine. Photo." /> cover 1887 (19 Dec.) XU5 (complete with contents) to England, written by the Governor, Sir William Grey Wilson, to his mother, forwarded to England by diplomatic pouch and franked with 1d. lilac cancelled in London showing, on reverse, superb "THE CASTLE/S<SUP>T</SUP> HELENA" oval d.s. in violet; small stain at left, otherwise fine. Photo. | Christie's