《徐霞客游记·粤西游日记九》
又经过南面上方向西的第七个洞口，见这里的石纹一层层的，有突出来的地方，可以落脚，有孔洞凹入之处，可以嵌手指攀登。
又过南上西向第七门，见其石纹层层，有突而出者，可以置足，有窍而入者，可以攀指。
Passing through the seventh cave entrance at the south and west, I saw the stone veins here were layered, with protruding places where one could stand, and holes and depressions where one could insert fingers and climb.