The dramatic ballet, or _ballet d'action_, was invented by the Duchess du Maine. We soon afterwards imported it into England as, in Opera, we imported the chorus, which was also a French invention, and one for which the musical drama can scarcely be too grateful. The dramatic _ballet_, however, has never been naturalized in this country. It still crosses over to us occasionally, and when we are tired of it goes back again to its native land; but even as an exotic, it has never fairly taken root in English soil. The Duchess du Maine was celebrated for her _Nuits de Sceaux_, or _Nuits Blanches_, as they were called, which the nobles of Louis XIV.'s Court found as delightful as they found Versailles dull. The Duchess used to get up lotteries among her most favoured guests, in which the prizes were so many permissions to give a magnificent entertainment. The letters of the alphabet were placed in a box, and the one who drew O had to get up an opera; C stood for a comedy; B for a ballet; and so on. The hostess of Sceaux had not only a passion for theatrical performances, but also a great love of literature, and the idea occurred to her of realising on the stage of her own theatre something like one of those pantomimes of antiquity of which she had read the descriptions with so much pleasure. Accordingly, she took the fourth act of _Les Horaces_, had it set to music by Mouret, just as if it were to be sung, and caused this music to be executed by the orchestra alone, while Balon and Mademoiselle Prévost, who were celebrated as dancers, but had never attempted pantomime before, played in dumb show the part of the last Horatius, and of Camilla, the sister of the Curiatii. The actor and actress entered completely into the spirit of the new drama, and performed with such truthfulness and warmth of emotion as to affect the spectators to tears. Mouret, the musical director of _Les Nuits Blanches_, composed several operas and _ballets_ for the Académie; but when the establishment at Sceaux was broken up, after the discovery of the Spanish conspiracy, in which the Duchess du Maine was implicated, he considered himself ruined, went mad and died at Charenton in the lunatic asylum. * * * * * [Sidenote: THE FREE LIST.]