Gainsborough Dupont, (English painter and engraver, 1754-1797), is now thought to be responsible for the watercolour painting "The edge of the wood" waco34 that was purchased as the work of Thomas Gainsborough in 1923.
Grove Biography (brief extract - see full content at Oxford Art Online) : Dupont, Gainsborough (b) Sudbury, Suffolk, 24 Dec 1754; d London, 20 Jan 1797)
English painter and engraver. He was the nephew of Thomas Gainsborough. On 14 January 1772 he entered his uncle's studio, where he remained until 1788. Although Dupont's technique was more frenetic, his palette more varied and his draughtsmanship weaker, scholars have only recently been able to separate Dupont's work from that of his uncle.