《徐霞客游记·黔游日记一》
又往北走半里，直达囤子所在之山的东麓，向北进入一道门。
又北半里，直抵囤山堡垒东麓，北向入一门。
I walked north for another half a mile and arrived directly at the eastern foot of the mountain where the stronghold is located, and entered a gate to the north.