《徐霞客游记·滇游日记三十七》
向南走下峡中一丈多，有个洞仍向西通进去，洞下边非常平坦，顶上高三四丈，宽约一丈五，向西进去也有五六丈，微微分为岔洞便断了，如同北洞一直进去的地方一样。
南向下峡丈余，有洞仍西向入，其下甚平，其上高三四丈，阔约丈五，西入亦五六丈，稍分为岐而止，如北洞之直入者焉。
Going south for a little more than one zhang, there is a cave that goes westward into the canyon, which is very level at the bottom, three or four zhang tall, and about five zhang wide, going westward for five or six zhang, and it is slightly divided into paths before it ends, just like the place where the north cave goes into.