19th Century English School ''PORTRAIT OF MARGARET BARKER, 1800; MARRIED NATHANIAL TWIZELL, 1800; AND GRANDSON JOSEPH COCK'' indistinctly inscribed and dated 18 Nov. 1862 on a label verso partial silhouette double portrait back-painted onto glass 30 x 22.5cms; 11 3/4 x 8 3/4in.