《徐霞客游记·黔游日记一》
又向东渡过溪水，往东北登上冈头，共一里左右，有环形土墙遗址，名叫关上，可是无居民房屋。
又东渡之，东北上冈头。共里许，有土环遗址，名曰关上，而无居舍。
Cross the stream to the east again, go northeast to climb the top of the hill, about a mile or so, there are ruins of circular earthen walls called Guanshang, but there are no residential houses.