In which year did this British peer and politician whose daughter was Henrietta Ponsonby, Countess of Bessborough pass away?
John Spencer, 1st Earl Spencer John Spencer, 1st Earl Spencer (19 December 1734 – 31 October 1783) was a British peer and politician.
Lady Constance Gaskell Lady Constance Harriet Stuart Milnes Gaskell, DCVO (née Knox; 21 April 1885 – 29 April 1964) was a Woman of the Bedchamber to Queen Mary from 1937–53 and Lady-in-Waiting to Princess Marina, Duchess of Kent from 1953–60.