cover -- 1858 (2 May) entire to Edinburgh, rated "6" in red, showing very fine single-ring Crowned circle "PAID/AT/ST THOMAS" in red, London Paid transit c.d.s. (18.5) and, on reverse, despatch and arrival (19.5) c.d.s.; the entire with discoloured vertical filing crease alongside the h.s. Rare. Photo