《明史·列传·卷一百六十九》
于是招募熟习水性的人去勘探，果有石脉横亘于两山之间，于是兴工修闸。
募善水者探之，果有石脉横互两山间，遂兴工。
He then recruited people who were familiar with water to explore, and果然 there were veins of stone running across the two mountains. As a result, the work of repairing the sluice gate began.