"Well, this is a commercial age, and so one must expect those things," answered Dave. "But I shall hate to see the Falls used for business. They are so pretty."

There was another turn just ahead, and it was lucky for Dave that he was running slowly, for there, across the road, were placed several logs and dead limbs of trees. As it was, he ran directly on top of some of the tree limbs before he could come to a stop, and Roger, so close behind, had to turn into some bushes to avoid ramming the car in front.

"Well, of all things!" burst out Phil, while several of the girls screamed in fright.

"Who did this?" demanded the senator's son.

"It is easy to see who did it," answered Dave. "See the sign?" And he pointed to a big white card, tacked to a post propped up among the logs and tree limbs. On the card was painted, in red, the following:

THIS ROAD CLOSED

By Order of Aaron Poole
Pres. Eureka Paper Co.

"This is some of Nat's work!" burst out Phil. "That is why he was in such a hurry to get ahead of us."

"I believe you," answered Dave. "I was afraid he was up to some trick, but I didn't want to say anything about it until I was sure."

"But if Nat is guilty, how did he know we were coming here?" asked Roger.