Mary Alice Cavendish, Duchess of Devonshire, GCVO, CBE (née Gascoyne-Cecil; 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.

[4] Her younger brother, Lord David Cecil, was a prominent biographer, historian and academic.

[13] On 26 November 1950, her husband Edward Cavendish, 10th Duke of Devonshire, had a heart attack and died at Compton Place while being attended by John Bodkin Adams, the suspected serial killer.

[14] In the process of transferring his assets to his son, the death of the Duke fell 10 weeks prior to a required 5-year period, and his estate was subjected to taxes of 80%.

[5] The Duchess died in Westminster, London, aged 93,[12] and is buried next to her husband in the churchyard at Edensor, Derbyshire, near Chatsworth.