He wrote three works of polemical history, including Liber ad amicum, which detailed the struggles between civil and religious authorities.
These disputes included the Bishop, on the one side, and the Abbot of S. Sepulcro; the People of Piacenca; and the subdeacon Bonizo.
The earliest reference to him as Bishop of Sutri is found in the dedicatory inscription of the church of S. Thomas in Cremona, on 3 October 1078.
[7] He was present in Rome during the discussions about the doctrines concerning the eucharist promoted by Berengar of Tours, just before the Roman synod of November 1078.
He was seized by Henry in late April 1082, and entrusted to the custody of the antipope Clement III, Archbishop Wibert of Ravenna.