Another fragment can now be added to the list of manuscripts of fourteenth-century secular Italian polyphony. The new source (henceforth called Fn F.5.5) comprises two leaves, and at present serves as guard-sheets at the front and back of an incunabulum in Florence, Biblioteca Nazionale Centrale, with the call-number Incunab. F.5.5. This fifteenth-century book is a copy of the monumental historical accounts by Flavius Josephus of early Jewish history – a compendium that includes the De bello judaico, De antiquitate judaica contra Apionem and Antiquitates judaicae – translated from Greek into Latin by Ruffino d'Aquileia (Rufinus Aquileiensis) and published in Venice by Rinaldo da Nimega in 1481.