. "Mary Ponsonby, Countess of Bessborough" . "Harriet Spencer" . . "Henrietta" . . . "her sister" . . . . "Countess of Bessborough" . "Henrietta Ponsonby, Countess of Bessborough" . "Lady Henrietta Frances Spencer" . . . . "1761-06-16" . . "Henrietta, Countess of Bessborough" . . . . . . "Lady Henrietta of Bessborough" . . . . . . "Lady Bessborough" . . . . . . . . . . . . . . . . . . . . . . . . . . . . "1821" . "1761" . . . . . . . "1821-11-11" . . . "Lady Henrietta Spencer" . . . . . "Henrietta Ponsonby, Countess of Bessborough" . . .