Question: When is Charles Gardiner, 1St Earl Of Blessington's wife's birthday?
Sentence (from "Marguerite Gardiner, Countess of Blessington"): Marguerite Gardiner, Countess of Blessington (née Power; 1 September 1789 – 4 June 1849), was an Irish novelist, journalist, and literary hostess.
Relevant evidence: Yes