《徐霞客游记·楚游日记一》
龙头岭的水分流往南北两面，从岭南面流下去的水，经东岭坞汇合秦人洞来的水流出大罗埠。
龙头岭水分南北，其南下之水，由东岭坞合秦人洞水出大罗埠。
The water from Longtoutling is divided into two branches, one flowing south and one flowing north. The water flowing down from the south side of the ridge converges with the water from Qinrendong through Donglingwu and flows out to Daluobu.