《徐霞客游记·滇游日记十九》
我从台边坠入石洞中，往西穿洞而出，又有耸立的石头，穿出缝隙而形成台，其下都是万初陡崖，用木头架成栈道通过，就是所说的太子过玄关。
余从台端坠石穴而入，西透窟而出，复有耸石，攒ｚｎ穿隙成台，其下皆危崖万仞，栈木以通，即所谓太子过玄关也。
I dropped from the platform into the stone cave, went west through the cave, and there were towering stones, forming a platform as they passed through the cracks, under which were steep cliffs, with a plank road built with wood for passage, which is the so-called Crown Prince's Passage of the Mysterious Gate.