From antiqueroyals.tumblr.com/page/21.
Princess Louise is wearing the same dress as in the previous image as well as last few images.
Keywords: 1864, Princess Louise, Princess, Hanover family, Sutherland family, British, straight coiffure, high neckline, chemisette, collar, jacket bodice, buttons, long close sleeves, cuffs, crinoline, earrings, bracelets