SAMUEL SHELLEY (BRITISH 1750/6-1808) Portrait miniature of Dupré Porcher Esq., wearing a brown coat, white waistcoat and cravat and powdered wig (inscribed on the reverse), Dupré Porcher Esq./ Guardian of M.A.E.C./ by/ Sam Shelley/ 6 Gt George St./ Hanover Square watercolour on ivory gilt metal frame oval, 75 mm (3 in) high