《徐霞客游记·粤西游日记三十七》
石片更加稠密闭合，间或杂以水潭小洲，尤为奇异。水潭西边又有一个石峡，里边也积着水，推想下边与水潭相通。
潭西又有一石峡，内亦潴水，想下与潭通。
The schist is more dense and closed, and occasionally mixed with pools and small islands, which is particularly strange. There is another stone canyon on the west side of the pool, which is also filled with water. It is inferred that it is connected to the pool below.