《徐霞客游记·粤西游日记二十九》
西面石壁上有一个深室，围成环状，洞中扩开，好像一盏琉璃灯，是禅室中最隐密的地方。
西壁上有奥室围环中拓，若悬琉璃灯一盏，乃禅室之最閟者。
There was a deep chamber on the west stone wall, forming a circle, and the cave was wide, like a crystal light, was the most secluded place in the meditation room.