Leslie offers his congratulations to d’Adhemar for his doctorate and praise from the court of Bayreuth. He discusses bibliographical notes on Voltaire, La Beaumelle, and Mme de Maintenon, and concludes with his recommendation of the Marquis de Fussey.

The letter discusses Jean Le Rond d’Alembert’s appointment to Berlin, Voltaire, Laurent Angliviel de La Beaumelle, and a depiction of the Prussian court published in Paris.

Marie-Anne de Vichy-Chamrond, marquise Du Deffand asks if Voltaire is sleeping, adding that he often makes her take pains in patience. She notes that she finds all books tiresome other than Voltaire’s. She then states that she has heard about a supplement to the Dictionnaire philosophique and questions why she does not have a copy of it, adding that she is not afraid of the costs involved. The Marquise then turns to Voltaire’s suspicion of four enemies, only three of whom he identified in his last letter (La Beaumelle, Beloste, and Belestat). She asks Voltaire for his opinion on the use of the term ‘fresh’ to denote a new or naive thought, before asking whether or not she had sent him the verses of the Abbé de Voisenon for the King of Denmark.