Claim: Peter of Dusburg began working on his Chronicon terrae Prussiae on behalf of Grand Master Werner von Orseln and by 1326 had finished expanding upon the now-lost work of a Latinist.
Evidence: In 1324, probably while in Königsberg, Peter began working on his Chronicon terrae Prussiae on behalf of Grand Master Werner von Orseln. By 1326, he had finished expanding upon the now-lost work of a Latinist who had written about the campaigns of the early Prussian Crusade.