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.
Henrietta Stanley, 4th Baroness Strange Henrietta Maria Stanley, 4th Baroness Strange (1687 – 26 June 1718) was an English peer.