George Montague; first Earl of Halifax on His White Hunter; Ironside; With His Groom on Justice; a Chestnut Foaled in 1721; James Seymour; 1702-1752; British; 1721; Gouache; graphite; and pen in black ink and brown ink on moderately thick moderately textured; beige; laid paper; Image: 6 3/16 x 10 9/16 inches (15.7 x 26.8 cm) and Sheet: 6 1/2 x 10 13/16in. (16.5 x 27.5cm); portrait