《后汉书·列传·刘虞公孙瓚陶谦列传》
未到以前，公孙瓒秘密派使者带书信告诉公孙续说： 从前周朝末年大乱，尸体遍地，据推测，总不相信有遣样的事。
未及至，瓚乃密使行人赍书告续曰： 昔周末丧乱，僵尸蔽地，以意而推，犹为否也。
Before he arrived, Gongsun Zan secretly sent a messenger with a letter to inform Gongsun Xu that: during the great chaos at the end of the Zhou Dynasty, there were corpses everywhere, and it was hard to believe that such a thing could happen.