"And what are they?" asked Walter.
"Water always runs down hill," reminded the guide with a significant smile.
"Eh? Of course it does," scoffed Stacy. "Did anyone ever see it run uphill?"
"I've known folks that thought it did," chuckled the guide.
"Why, I can show you watercourses where you'd be willing to stake your life the water was running in a certain direction, whereas it's going the other way."
"Humph!" grunted Chunky. "They couldn't fool me that way."
"You think so?" laughed Cale.
"I know so," retorted Stacy.
"Well, now suppose we were standing beside a stream, say like the river before us, only in a place where the direction of the current deceived you. I said the water was running that way, the way it does, and you declared it was moving in the other direction, how would you prove whether you were right or wrong?"
Stacy puffed up with importance.