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 explores the mythological founding figures of Friesland, drawing inspiration from Voltaire’s La Henriade. Friso is regarded as Jonkheer Willem van Haren’s most celebrated work.