《徐霞客游记·粤西游日记四》
又越过石崖上走，石崖右边有个深潭，渊深漆黑全像獭子潭一样，但大处宽处更超过它，这里名叫龙江，它大概与獭子潭是相通的。
又逾崖而上，其右有潭，渊黑一如獭子潭，而宏广更过之，其盖与獭子相通焉。
Continuing along the stone cliff, there is a deep pool on the right. The pool is as deep and dark as the Otter Pool, but larger and wider. It is called Longjiang Pool, and it is probably connected to the Otter Pool.