A signed portrait miniature of Georgiana Cavendish, Duchess of Devonshire, 19th to early 20th century, signed Cosway, (Richard 1742-1840) but after, an opposite half portrait of a work originally by Thomas Gainsborough painted in 1787, in watercolours on ivory or ivorine, housed in a pinchbeck frame; as found, height 10 cm, width 8 cm