《徐霞客游记·滇游日记三十四》
山坳北边有条路自崩裂的山崖北面的山岭往东行，南边也有小路，自崩裂的山崖南面的山岭往东上行，可山坳中唯独没有北面来相交的路。
坳北有路自崩崖北岭东行，南亦有微路，自崩崖南岭东上，而坳中独无北交之路。
To the north of the pass, a path ran eastwards from the ridge north of the avalanche-ravaged cliff face, and to the south, another path ran eastwards from the ridge south of the cliff face, but there was no path in the pass itself coming from the north.