“ Falling into disgrace with Berengar on his return, he attached himself to the emperor Otto I., whom in 961 he accompanied into Italy, and by whom in 962 he was made bishop of Cremona. He was frequently employed in missions to the pope, and in 968 to Constantinople to demand for the younger Otto (afterwards Otto II.) the hand of Theophano, daughter of the emperor Nicephorus Phocas. ”

“ Historia Ottonis, a work of greater impartiality and merit, unfortunately covering only the years from 960 to 964; and (3) the Relatio de Legatione Constantinopolitana (968–969) . All are to be found in the Monum. Germ. ”