《徐霞客游记·粤西游日记二十九》
本地人说： 向南钻出去，也有一个明亮的圆形石室，面向南。 
土人云： 透而南出，亦有明室一围，南向。 
A local said: drill out to the south, there is also a bright round stone chamber facing south.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 土人云： 透而南出，亦有明室一围，南向。  [/INST] A local said: drill out to the south, there is also a bright round stone chamber facing south.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 土人云： 透而南出，亦有明室一围，南向。
user
A local said: drill out to the south, there is also a bright round stone chamber facing south.
assistant