The manuscript contains the opening lines of Jonkheer Willem van Haren’s epic poem ‘Friso’. The title, ‘Commencement du poème épique de M. Van Haren intitulé Frizo., is written in Voltaire’s hand. This epic poem explores the mythological founding figures of Friesland, drawing inspiration from Voltaire’s Henriade. It stands as Jonkheer Willem van Haren’s most celebrated work.