From eBay; spots removed from background fixed with Photoshop and sepia tone removed by gogm.
Princess Louise wears the same dress seen in the last image, a half-cone crinoline.
Keywords: Hills & Saunders, Princess Louise, Princess, Hanover family, Sutherland family, British, straight coiffure, high neckline, collar, buttons, long close sleeves, cuffs, crinoline, earrings