 There he met the reform-minded cleric from Piedmont, Abbot William of Volpiano.In 1028 he traveled to Italy with Volpiano, who encouraged him write what would become his masterpiece, the "Historiarum libri quinque ab anno incarnationis DCCCC usque ad annum MXLIV" ("History in five books from 900 AD to 1044 AD").The chronicle was dedicated to the Abbot of Cluny, Odilo.