《徐霞客游记·粤西游日记四》
我伫立在桥上，见山涧中有个洗衣极水的人，我问他： 此条涧水从东北流来，可不可以溯流进洞去？ 
余伫立桥上，见涧中有浣而汲者，余询： 此水从东北来，可溯之以入否？ 
I stood on the bridge and saw someone washing clothes in the mountain stream. I asked him, "This stream flows from the northeast. Can I follow it into the cave?"