From invaluable.com/auction-lot/margaret-sarah-carpenter-1793-1872-british.-87-c-8ee37c4d4c.
Henrietta’s coiffure lacks the profusion of curls fashionable throughout the 1800s to 1830s. Her skirt has an A-line announcing the early 20s. This is probably an advertising portrait.
Keywords: 1821, Carpenter - Margaret, Henrietta Shuckburgh, Shuckburgh family, Collins family, straight coiffure,turban, earrings, chemise, sweetheart neckline, Empire bodice, sweetheart décolletage, quarter length full paned sleeves, jeweled waist band, Empire waistline, A-line skirt, wrap