Robert Gascoyne-Cecil
Mary Alice Cavendish, Duchess of Devonshire, (; 29 July 1895 – 24 December 1988) was a British courtier who served as Mistress of the Robes to Queen Elizabeth II from 1953 to 1967. She was the granddaughter of Prime Minister Robert Gascoyne-Cecil, 3rd Marquess of Salisbury.