《明史·志·卷六十二》
年老有识的人说， 京口闸底与虎丘塔顶齐平 ，从这可以知道挖河毫无益处，积聚湖水最为重要。
故老有言， 京口闸底与虎丘塔顶平 ，是可知挑河无益，蓄湖为要也。
The elderly people with knowledge said that the bottom of the Jingkou sluice gate is level with the top of the Huqiu Tower, from which it can be seen that digging the river is useless, and it is most important to accumulate lake water.