The collection contains a mix of manuscript and print items, some of which are in the hand of Prosper Marchand (1678-1756).

The author presents a drawing of the Battle of Rosbac by d’Etalonde to the King, highlighting the profound admiration and dedication of an officer eager to serve in such battles. He expresses gratitude for the King’s support and the impact it has had on the officer’s loyalty, who is more focused on serving under the King than seeking any grace in France. The author commends the King’s ability to balance significant matters with personal attentiveness and reflects on the recent less impressive French coronation compared to the King’s impressive multifaceted leadership. He concludes with a declaration of lifelong loyalty and devotion to the King.

The dedication of the tragedy d’Oreste to the duchesse du Maine, protector of Voltaire, which contains numerous corrections by Voltaire as well as passages that do not appear in the printed dedication. Voltaire recalls the splendour of Louis XIV, to which the duchesse du Maine contributed so much, particularly with regard to her taste for the interpretation of plays. Voltaire writes that he has not forgotten that the duchesse du Maine offered him a secret asylum in her Château de Sceaux four years earlier, where he wrote Zadig. In an appended note, Louise Bénédicte de Bourbon, duchesse du Maine writes that she does not deserve such praises but that she approves of the epistle.