《徐霞客游记·江右游日记十》
下了岭便溯溪往东南走，一里为雷公场，又往南三里为深坑。
下岭即东南溯溪，一里为雷公场，又南三里为深坑。
After descending the ridge, we followed the stream and walked southeast. One li later, we reached Leigong Field. Another three li south was Shenkeng.