to Demerara, rated "4" and bearing 3d. vertical pair, placed sideways and cancelled with a good complete strike and with fine H3 oval d.s. at left; attractive. Photo" /> cover 1875 (22 May) envelope<I> "per Mail Steamer Via St. Thomas"</I> to Demerara, rated "4" and bearing 3d. vertical pair, placed sideways and cancelled with a good complete strike and with fine H3 oval d.s. at left; attractive. Photo | Christie's