Lady Grant; Wife of Sir James Grant; Bt.; Henry Walton; 1746-1813; British; Formerly attributed to Johan Joseph Zoffany RA; 1733-1810; German; active in Britain (from 1760); ca. 1775; Oil on canvas; Support (PTG): 30 x 25 inches (76.2 x 63.5 cm); bouquet; chair; column (architectural element); draperies; embroidery; flowers (plants); hairpiece; necklace; portrait; white (color); wife; woman