The manuscript is the lettre en vers, containing three poems interspersed with prose passages. In praising Voltaire’s literary prowess, Baron de Rouville highlights the publication of odes lavishly extolling Voltaire’s tragedy D’Alzire. The author underscores his steadfast loyalty to Voltaire, pledging to staunchly defend him against adversaries and prosecutors. Baron de Rouville concludes the letter by expressing keen interest in the latest publications of the philosopher Sans Souci.