Portrait of a Man (the Third Duke of Roxburghe?)
Pencil, red chalk, brown and blue watercolor, with touches of pen and black ink, on paper.
9 1/4 x 5 9/16 inches (231 x 142 mm)
Inscribed and dated in pencil across lower border of mount, "Cosway R A Primarius Pictor Serenissimi Walliae Principis Fecit 1789".
P & D Colnaghi and Co., London.