《徐霞客游记·粤西游日记三》
下山后，又向西行，这才看见峰顶洞口向西下坠之处，只觉得高峡空悬，抬头眺望看不出头绪，山下有长长的墙垣围绕着它，是王府的园圃。
既下，又西行，始见峰顶洞门西坠处，第觉危峡空悬，仰眺不得端倪边际，其下有遥墙环之，则藩府之别圃也。
After descending the mountain, I headed west again. This time, I saw the place where the entrance of the cave at the peak fell towards the west. I only felt that the high gorge was suspended in the air. I looked up and could not see the end. At the foot of the mountain, there was a long wall surrounding it, which was the garden of the prince's palace.