Painting. [Joseph Burch] (1825-1898) / Charles Duval, 1860. Oil on canvas; 84 x 68.5 cm. Signed and dated blc, CA Duval Manchester 1860. Inscription painted lower verso of canvas: No.4 Portrait of Joseph Burch Inventor. Painted for Museum of Patents London by CA Duval Essex St Manchester. Portrait, HS slightly to L