19th century FRENCH SCHOOL. Portrait of Joseph Prudhomme. Black stone, gray and brown wash. Signed in pen and brown ink at left Gallus (?). Annotated in the lower part Monsieur Joseph Prudhomme. H. 17 - 13 cm. To be compared with the portrait of Henry Monnier transvestite as Joseph Prudhomme (circa 1875) in the Musée d'Orsay photograph by Etienne Carjat.