1837 Lady Louisa Cavendish (The Duchess of Devonshire) engraved by W. H. Mote from A. E. Chalon original
The Dukes and Duchesses change, but the name is still Cavendish.
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

