This book, "The unpublished correspondence of Madame du Deffand with d'Alembert, Montesquieu, the President Henault, the Duchess du Maine, Mesdames de Staal, de Choiseul, the Marquis d'Argens, the Chevalier D'Aydie, &c. : followed by the Letters of Voltaire to Madame. 1", by Marie de Vichy Chamrond Du Deffand, is a replication of a book originally published before 1810. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.