《徐霞客游记·粤西游日记三十五》
西面水潭之深无人能走到头，说是像一缕垂丝，也未必可知，水边没有洞，深入其中的洞穴应当潜伏在水底。
西潭之深莫能竟，曰垂丝一络，亦未可知，然水际无洞，其深入之窍当潜伏水底耳。
The depth of the west pool has not be reached by anyone, and it has been said to be like a thread hanging down, which is not really correct. There are no caves along the waterside, and the caves that stretch into it must lurk under the water.