《徐霞客游记·粤西游日记三十六》
进洞后，中间辟开一个石室，从东北攀缝隙上去，又找到一个小石室，它东北的深处顶上悬垂着伞盖，下边耸起一个圆形石笋，像人的头，就是指认为是卢僧的地方了。
既入，中辟一室，从东北攀隙上，又得一小室，其东北奥上悬垂盖，下耸圆笋，若人之首，即指以为卢僧者也。
After entering the cave, a stone chamber was opened in the middle. Climbing up the cracks from the northeast, another small stone chamber was found. A canopy was hanging from the top of its northeast deep end, and a round stalagmite rose from the bottom, which looked like a human head. This is the place that was referred to as Lu Monk's.