The Governess of the Children of France was the Viscountess of Gontaut, who, as a recompense for the manner in which she had accomplished her task, was made Duchess by Charles X. in 1826. Here is the opening of her unpublished Memoirs:-
"January, 1853. To Madame the Countess and Monsieur the Count Georges Esterhazy. My dear children, you have sh