《徐霞客游记·滇游日记十五》
此坞名牛井，有上下各村，溪水从鸡足山峡谷中流来，是所说的盒子孔河的下游。
此坞名牛井，有上下诸村，其水自鸡足峡中来，所谓盒子孔之下流也。
This valley is called Niu Jing, with villages above and below, and the stream flows from the Jizu Mountain canyon, which is the lower reaches of the Hezi Kong River mentioned earlier.