《徐霞客游记·滇游日记二十三》
越过岭脊往西下到峡谷中，行二里，峡谷开始开阔但往下走更陡，又走一里多，才走上平路。
越脊西下峡中，二里，峡始豁而下愈峻，又一里余，始就夷平地。
Go down the ridge to the west and down to the canyon. After two miles, the canyon began to open up but the descent was steeper. After walking another mile or so, I came to a flat road.