In 1070 William the Conqueror called him to take up a diocese in England, to which the monk responded with his Oratio ad Guillelmum, denouncing the Norman Conquest.
In 1070, William the Conqueror requested that the monk take on a position as a bishop in England. The monk responded by composing an address to William, titled "Oratio ad Guillelmum," denouncing the Norman Conquest.