Circle of Michael Dahl the Younger (Stockholm circa 1659-1743 London) Portrait of John Churchill, 1st Duke of Marlborough, bust-length engraved with ducal coronet above initials 'J.D.M' (on reverse) oil on copper, oval 8.1 x 6.7cm (3 3/16 x 2 5/8in). within gilt- metal acorn leaf mount beneath enamel cresting of the Marlborough coat-of-arms Footnotes: Provenance With Ellison Fine Art, London, where purchased by the present owner For further information on this lot please visit Bonhams.com