 Herman of Laon ("Hermannus monachus", "Herman the monk"), writing in his "De miraculis sanctae Mariae Laudunensis de gestis venerabilis Bartholomaei episcopi et sancti Nortberti libri tres" ("Three Books on the Miracles of Saint Mary of Lyon, on the Deeds of the Venerable Bishop Bartholomew, and on Saint Norbert"), notes that