Her article in thepeerage is here. She was in her second marriage when this portrait was made. Her first marriage was to one James Alexander, Comte de Tilly. She was the first of Henry Baring's two wives.
Maria Matilda wears a typical Empire formal dress in gleaming white in a portrait that shows how revealing such dresses could be.
Keywords: Lawrence - Thomas, Maria Matilda Bingham, Bingham family, Baring family, Countess, British, long straight coiffure, square neckline, quarter length full sleeves, quarter length tight sleeves, waist band, Empire low waistline, close skirt, hosiery, necklace, shoes