Herbert

…was soon taken prisoner by Herbert, count of Vermandois, who used him for his own gain against Rudolf, Robert’s son-in-law and the new king.

…involved in a dispute between Herbert, Count of Vermandois, who wanted his son Hugh as archbishop of Reims, and Artauld, Flodoard’s patron. Herbert had Flodoard imprisoned for a time in 940–941. After the meeting in 948 of a synod at Ingelheim, at which Pope Agapetus II reinstated Artauld, Flodoard was…

…obliged to cede Laon to Herbert, count of Vermandois, who had earlier been a principal supporter but now exploited his possession of the person of Charles the Simple to blackmail the king.