《徐霞客游记·黔游日记八》
再后来，仍登到明亮天窗的东南方，攀援到矗立石柱的侧面，钻到石柱南边，在水平方向上看见拱桥的背部，十分平坦而且很近，但高悬的石壁上没有石痕，上上下下都绝无攀附践踏之处，咫尺之间难以飞度。
再后，仍登明窗东南，援矗柱之腋，透出柱南，平视蛩桥之背，甚坦而近，但悬壁无痕，上下俱绝攀践，咫尺难度。
Later on, I still climbed to the southeast of the bright skylight, climbed to the side of the standing stone pillar, drilled to the south of the stone pillar, and saw the back of the arch bridge in the horizontal direction. It was very flat and very close, but there was no on the high stone wall. There is no place to climb and step up and down, and it is difficult to fly over the distance.