《水经注·卷十三》
又往东流过涿鹿县北面，琢水发源于涿鹿山，世人称为张公泉，往东北流经涿鹿县老城南面，就是王莽时的柿陆。
又东过涿鹿县北，涿水出涿鹿山，世谓之张公泉，东北流径涿鹿县故城南，王莽所谓抪陆也。
It flowed eastward again, passing the north of Zhuolu County. The Zuo River has its source in Zhuolu Mountain, which was called Zhanggong Spring by the world. It flowed northeast, passing the south of the ancient city of Zhuolu County, which was Shiliu during the reign of Wang Mang.