GENEVA, CIRCA 1780, MAKER'S MARK INITIALS M&I WITH CORONET ABOVE AND CRESCENT BELOW

The miniature is taken from a print published in 1776, by W. W. Ryland after Angelica Kauffman's painting in the collection of Hugh Smythyson, 1st Duke of Northumberland, illustrated in W. W. Roworth (ed.), Angelica Kauffman. A Continental Artist in Georgian England, Brighton, 1995, p. 156, fig. 129.