cover 1d. letter sheet, A21, used from Dalkeith to Edinburgh and dated 22 July 1840, bearing 1840 1d. plate 1a, OA (re-entry), good even margins, tied by red Maltese Cross with additional strike in centre; the Mulready with central vertical crease, short filing note on front and portion of flap around the seal "fitted-back" into place, otherwise fine and an attractive item. Photo