From bbc.co; size doubled. The black and white portrait seen in the last image is "flipped."
Countess Maria Theresa's Parliament dress has the wide sleeves and slightly raised hem of the early 1830s in this portrait.
Keywords: 1831, Maria Theresa Talbot, Countess of Shrewsbury, Talbot family, Countess, British, hurluberlu coiffure, coronet, floral headdress, bateau neckline, neckline ruff, elbow length puffed sleeves, engageantes, lace, jeweled belt, natural waistline, A-line skirt, maxi-length skirt, fringe, shoes, necklace, earrings, jeweled bodice ornament, jeweled crucifix, bracelets, robes, court dress