《北史·本记·卷十二》
当月，武阳郡丞元宝藏以所属郡叛变，归附李密，并和贼帅李文相攻下黎阳仓。
是月，武阳郡丞元宝藏以郡叛归李密，与贼帅李文相攻陷黎阳仓。
During that month, Wuyang County Registrar Yuan Baocang surrendered his county to Li Mi, and together with rebel chief Li Wenzhang, captured Liyang Granary.