thumb|engraving of a Joshua Reynolds self-portrait
John Keyse Sherwin (175124 September 1790) was an English engraver and history-painter.
Biography
Sherwin was born at East Dean in Sussex. His father was a wood-cutter employed in shaping bolts for shipbuilders, and the son followed the same occupation till his seventeenth year, when, having shown an aptitude for art by copying some miniatures, he was adopted by his father's landlord, William Mitford. Sherwin was sent to study in London, first under John Astley, and then for three years under Francesco Bartolozzi – for whom he is believed to have executed a large portion of the plate of Clytie, after Annibale Carracci, published as the work of his master.
Sherwin entered as a student of the Royal Academy, and gained a silver medal, and in 1772 a gold medal for his painting of "Coriolanus taking Leave of his Family". From 1774 till 1780 he was an exhibitor of chalk drawings and of engravings in the Royal Academy. Establishing himself in St James's Street as a painter, designer and engraver, he attained popularity and began to mix in fashionable society. His drawing of the "Finding of Moses", a work of but slight artistic merit, which introduced portraits of the princess royal of England and other leading ladies of the aristocracy, hit the public taste, and, as reproduced by his burin, sold largely. Sherwin died in extreme penury on 24 September 1790according to George Steevens, the editor of Shakespeare, at The Hog in the Pound, an obscure alehouse in Swallow Street, or, as stated by his pupil J.T. Smith, in the house of Robert Wilkinson, a printseller in Cornhill.