《徐霞客游记·黔游日记六》
道路顺着水流走，往西沿着北边的山崖下坠，就是所谓的乌鸣关了，当地人称呼为老鸦关。
路随之，西循北崖下坠，即所谓乌鸣关也，乌鸣关在安南卫。土人呼为老鸦关。
The road went down along the stream, falling westward along the cliff to the north. That was the so-called Wumingguan, which locals called Laoyaguan. 