《水经注·卷三十七》
县治在武陵郡下―武陵郡本来是楚时的黔中郡。秦昭襄王二十七年。
南对沅南县，后汉建武中所置也。
The county government is under Wuling County - Wuling County was originally the Qianzhong County of the Chu Dynasty. King Zhaoxiang of Qin was twenty-seven years old.