《徐霞客游记·游恒山日记》
返下来时经过北岳殿东，远看两座山崖的断裂处，中间下垂千尺，杂草丛生，这是登绝顶的小路，于是脱掉外衣，攀扯践踏着杂草往上登。
还过岳殿东，望两崖断处，中垂草莽者千尺，为登顶间道，遂解衣攀蹑而登。
On the way back down, I passed by the east of the Beiyue Hall and looked at the crack between the two cliffs from afar. In the middle, there was a 1000-foot drop with overgrown weeds. This was the path to the summit, so I took off my coat and climbed up by trampling on the weeds.