From bbc.co; image made lighter by gogm.
Duchess Margaret's portraits show she preferred to dress simply. Her neckline shows a trace of modesty piece, an under-bodice probably formed by her corset (stays), and a laced bodice.
Keywords: Dahl, Margaret Bentinck, Margaret Cavendish Bentinck, Duchess of Portland, Duchess, British, long straight coiffure, feathered hat, ribbon headdress, chemise, modesty piece, corset, laced bodice, scoop neckline, tight sleeves