《徐霞客游记·粤西游日记二十八》
随它的支流向东去游琅山岩。游完后，韦守老还未到，我再去百感岩，游东边的上洞。又从百感岩的大洞内摸黑穿到洞北，下到百感村。
复从百感大岩内，暗中穿洞北，下百感村。
Following its tributary, I went east to visit Langshan Yan. After the visit, Wei Shoulao had not yet arrived, so I went to Baiganyanshan again to visit the upper cave on the east side. Then, I groped around in the dark from the large cave of Baiganyanshan and passed through to the north of the cave, down to Baigan Village.