Mrs. Robinson as Perdita, ca. 1779, Graphite, blue chalk, and watercolor, with touches of gouache, oval sheet: 7 13/16 x 6 in. (19. 9 x 15. 3 cm), Drawings, Richard Cosway (British, Oakford, Devon 1742?1821 London), This lovely young woman seated in a park, fingering a spindle wound with thread and accompanied by her dog, is Mary Robinson. When she performed the role of Perdita in an adaption of Shakespeare's 'Winter's Tale, ' staged by David Garrick in 1779, George, Prince of Wales fell in love with her, and she became his mistress for two years