[VOLTAIRE (1694-1778)]. P.S. "Lebegue", Compiègne August 7, 1765; oblong vellum in-fol. with tax seal of the Generality of Paris, brown wax seal partially broken. Affaire Calas. Royal privilege granted by Louis XV to the Widow Calas to print, engrave, sell and distribute "a print representing the Calas family". On the back, annotation signed by the bookseller Le Breton, syndic of the Chamber of Booksellers and Printers of Paris.