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 to the King a drawing of the Battle of Rossbach by D’Étalonde, emphasising the deep admiration and devotion of an officer eager to serve in such campaigns. He expresses gratitude for the King’s support, noting its effect on strengthening the officer’s loyalty, and observes that the latter is more intent on serving under the King than seeking favour in France.

He further commends the King’s ability to combine attention to major affairs with personal consideration, and contrasts this with the recently less impressive French coronation, underscoring instead the King’s multifaceted and exemplary leadership.

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.