In which year did this British peer and politician whose daughter was Henrietta Ponsonby, Countess of Bessborough pass away?
Henrietta Ponsonby, Countess of Bessborough Henrietta Ponsonby, Countess of Bessborough (16 June 1761 – 11 November 1821), born Lady Henrietta Frances Spencer (generally called Harriet), was the wife of Frederick Ponsonby, 3rd Earl of Bessborough, and mother of the notorious Lady Caroline Lamb. Her father, John Spencer, 1st Earl Spencer, was a great-grandson of John Churchill, 1st Duke of Marlborough. Her sister was Georgiana Cavendish, Duchess of Devonshire.
Evelyn Cavendish, Duchess of Devonshire Evelyn Emily Mary Cavendish, Duchess of Devonshire {'1': ", '2': ", '3': ", '4': "} (née Petty-FitzMaurice; 27 August 1870 – 2 April 1960) was the wife of Victor Cavendish, 9th Duke of Devonshire. She was born the elder daughter of the politician Henry Petty-FitzMaurice, 5th Marquess of Lansdowne and grew up amidst public life. Evelyn's marriage to Cavendish, the heir of the 8th Duke of Devonshire, led to her becoming Duchess of Devonshire in 1908. With her position, she oversaw the reorganisation of the Devonshire estates and presided over four English houses and one Irish castle.