《徐霞客游记·粤西游日记二十七》
考察钟上的铭文，说： 下雷是宋代、元代以来的古州，国朝初年被妒忌的府官藏匿了官印不缴纳出来，未受到皇帝钦赐，沦为土炯的时间有二百年。
考其文曰： 下雷乃宋、元古州，国初为妒府指镇安也。匿印不缴，未蒙钦赐，沦于土峒者二百年。
I examined the inscriptions on the bell. It said: Xia Lei was an old prefecture form the Song and Yuan Dynasties. In the early years of the Ming Dynasty (1368-1644), a jealous prefecture official hid the official seal and did not submit it. As a result, the prefecture was not granted imperial permission and declined into a chieftaincy for two hundred years.