Her article in thepeerage is here which states that she was an MP.
From bbc.co; color saturation increased with Photoshop by gogm.
Lady Mowbray wears a white cap and a black dress adorned with lace in this 1887 Baccani portrait.
Keywords: 1887, Baccani, Elizabeth Mowbray, Mowbray family, Gray family, British, straight coiffure, cap, square neckline, modesty piece, lace, three quarter length tight sleeves, necklace, brooch, bracelets