《徐霞客游记·滇游日记二十五》
又向北行半里，忽然看见山麓有几棵树高撑在空中，出现在马足之下，树下涂涂的流水声从树丛间传出来，那么，洞穴里的泉水是从山底部向东渗过缝隙后流出来的。
又北半里，忽见山麓有数树撑空，出马足下，其下水声淙淙出树间，则泉穴自山底东透隙而出也。
Traveling north for half a li more, I suddenly saw several trees towering high into the sky at the foot of the mountain, appearing under my horse's hooves. The sound of running water came from among the trees. It must be spring water from the cave flowing out through a gap in the bottom of the mountain and then to the east.