The fourth author of the formulary book recorded some events of the Ottoman wars in the 15th and 16th centuries, which reflected his historiographical awareness. He began the chronology on the page 265 "recto", in the space left blank by the original author under his own work, the biographical data of the kings of Hungary. This section lasted from 1438 (the Ottoman occupation of Szászsebes, today Sebeș, Romania) to 1469 (in fact 1467, Matthias' unsuccessful invasion to Moldavia). The author continued the chronology in 264 "verso". It narrates the events from 1479 (the Battle of Breadfield) to 1567 (in fact 1566, the Siege of Szigetvár and the death of Suleiman the Magnificent).