A George III Scottish mounted horn snuff mull

A George III Scottish mounted horn snuff mull, with an applied thistle and a circular cartouche on the cover, inscribed "R. Dewar", a shield on the body with engraved masonic emblems and the name "W. Wishart" inscribed on the rim between engraved thistles, unmarked, c.1815, 3.4in (8.8cm).