《徐霞客游记·粤西游日记三十一》
又向东南走四里，渐渐上登土山，共有一里路，翻越而下，下到一处深峡中，有水流从西南通过峡底，往东北流入大江。
又东南四里，渐陟土山，共一里，逾而下，得深峡焉，有水自西南透峡底，东北入大江。
Heading southeast for another four miles, we gradually ascend a hill, about one mile altogether, we descended, and reached a deep gully, with water flowing through the bottom of the gully from the southwest, and flowing northeast into the wide river.