Frederick Augustus, Duke of York and Albany, by Henry Pierce Bone (1779-1855).

Oval, enamel on copper in a gilt-metal mount and frame, 16.5cm. Signed, inscribed and dated 1847 on the reverse.
The Duke (1763-1827), shown wearing the chain of the Order of the Garter and the Order of the Bath, was the second son of King George III.
Henry Pierce Bone (1779-1855) trained with his father, the noted enamel painter Henry Bone (1755-1834). He later worked for some years in oils, but reverted to enamels and became enamel painter to Queen Victoria and Prince Albert.