Lady Isabella's skirt has about four layers and she also may be wearing a wig and fichu in this 1864 photo.
Keywords: Clementine Maude (?-1865) - as photographer, Isabella Grace Maude, Baroness Colchester of Colchester, Maude family, Abbott family, Baroness, straight coiffure, feathered headdress, veil, lace, fichu, vee waistline, bows, long close sleeves, cuffs, over-skirt, middle skirt, under-skirt, petticoat, fan