Question: In which year did this British peer and politician whose daughter was Henrietta Ponsonby, Countess of Bessborough pass away?
Sentence (from "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.
Relevant evidence: No