1911 Encyclopædia Britannica, Volume 22… (1911)
“ On King Louis's refusal, he proceeded to war. The chief hero on the Vermandois side was Bernier, a grandson of Count Herbert, who had been the squire and firm adherent of Raoul, until he was driven into opposition by the fate of his mother, burned with the nuns in the church of Origny. Bernier eventually slew the terrible Raoul in single fight, but in his turn was slain, after an apparent reconciliation, and the blood-feud descended to his sons. ”
