Louis Constant Wairy,
Recollections of the Private Life of Napoleon…
“ The next morning when he saw the Empress, he remarked, "Well, you did not go to the opera ball, after all!"—"Oh, yes, indeed I did."—"Nonsense!" —"I assure you that I went. And you, my dear, what did you do all the evening?"—"I worked."—"Why, that is very singular; for I saw at the ball last night a domino who had exactly your foot and boots. I took him for you, and consequently addressed him." The Emperor laughed heartily on learning that he had been thus duped; the Empress, just as she left for the ball, had changed her costume, not thinking the first sufficiently elegant. ”
