The Dukes and Duchesses change, but the name is still Cavendish.
Upgrade image posted 12 April 2014 from eBay.
Duchess Louisa appears to be wearing a head band right at her scalp line and either gigot or imbecile sleeves. Her dress may have a wrap or a bertha of contrasting material.
Keywords: 1837, Chalon, Mote, Duchess, Cavendish family, British, straight coiffure, head band, trapezoidal neckline, modesty piece, bertha, lace, bows, gigot sleeves, belt, jeweled buckle, natural waistline, full skirt