《徐霞客游记·粤西游日记三十三》
听说它南面在水下有缝隙，大水从北面冲捣下来，洞装满不能容纳，就跃出山南的石崖。
闻其南有隙在水下，大潦从北捣下，洞满不能容，则跃而出于山南之崖。
I hear that there is a gap in the south underwater, and when a large amount of water rushes down from the north, the cave cannot hold it and it bursts out over the cliff face on the south side of the mountain.