《徐霞客游记·滇游日记二十八》
路的西边有条峡谷，自西面的山坳下坠而来，又有座山，在峡谷南边傍着峡谷一起往东延，在南突的山嘴之下。江水与胜备江汇合后冲破山嘴南面的山峡。南突山嘴上的路，不能越过峡谷过到山嘴南边傍着它的东垂走，所以向西折转一里多，而后下山沿着它西边的山坳走，又折向东一里，而后上走绕到它的东垂，东垂就是胜备江冲破的峡谷西边的山崖。
盖其西有峡，自西坳下坠而来，又有山，从峡南挟之俱东，当突嘴之下，与胜备合而破其南峡，突嘴之路，不能超峡而度其南挟之东垂，故西折一里余。而下循其西坳，又东折一里，而上盘其东垂，东垂即胜备所破峡之西崖也。
On the west side of the road, there is a valley extending from the gully on the west and a mountain, next to the valley on the south, extending eastward under the protruding tip of a mountain on the south. After merging with Shengbei River, the water rushed through the canyon south of the tip. The road on the protruding tip of the south mountain cannot cross the valley to walk along its east side which is next to the south side of the tip, so it turns west for more than a mile, then goes down the mountain and walks along the gully on the west side of it, then turns east for another mile, and then goes around to its east side, which is the cliff on the west side of the canyon through which Shengbei River burst.