《徐霞客游记·滇游日记十》
再往南到岩壁转角的突起处，有一块巨石坠落在岩壁侧面，迎流分道，上面写有 醒石 二字，是冷然的笔迹。巨石北面的陡岩上，有 虚明洞 三个大字，因在高处而不能看清是什么人的手笔。
 虚明 二字，非此洞不足以当之。 虚明 大书之下，又有刻 听泉 二字者，字甚古拙，为燕泉笔。
Further south to the protrusion of the rock wall corner, there is a huge stone falling on the side of the rock wall, facing the current, and the word "wake stone" is written on it, which is Leng Ran's handwriting. On the steep rock on the north side of the boulder, there are three large characters "false Ming cave", which cannot be seen clearly due to the height.