《徐霞客游记·粤西游日记三十六》
前边有三个洞口，都是向西；后面通到山背后也有三个洞口，都朝向东南。
前有三门，俱西向；后通山背亦有三门，俱东南向。
In front there are three cave openings, all facing westwards; at the back there are also three cave openings leading to the other side of the mountain, and these all face southeast.