《明史·志·卷六十二》
岁贡生许汝愚上奏说： 建国之初设立四座闸门：叫做京口、丹徒的，防止三江水的干枯；叫做吕城、奔牛的，防止五湖水的排泄。
岁贡生许汝愚上言： 国初置四闸：曰京口，曰丹徒，防三江之涸；曰吕城，曰奔牛，防五湖之泄。
Scholar appointed to the Royal Academy for his annual tribute, Xu Ruyu memorialized: At the founding of the country four sluice gates were set up: called Jingkou, Dantu, to prevent the Three Rivers from drying up; called Lyucheng, Benniu, to prevent the draining of the Five Lakes.