《徐霞客游记·滇游日记三十五》
来凤山到了此地往南下降低伏，山脊间中间下洼成平坦的池塘但不容水。
来凤至是南降而下伏，脊间中洼为平塘而不受水。
At this point, Laifeng Mountain is lower in the south, and the depression in the middle of the ridge is a flat pond, but it cannot hold water.