《徐霞客游记·粤西游日记三十八》
顺小溪往西行三里，渐渐转向北，土山山坞完了，西面山陇间有数十家人家，这是土寨关，是南丹州土司征税的关口。
随小水西行三里，渐转而北，土山坞尽，西山陇间有数十家倚之，是为土寨关，则南丹土税之钥也。
Walking three miles westward along the creek, it gradually turned north, and the ravine of Tushan Mountain ends. There were dozens of families living in the valley between the mountains on the west, which was Tuzhai Pass, a pass where the chief of Nandanzhou collects taxes.