Here and there were tracks which must have been made by Teddy, but it was not certain that the two had been together. After a time the boys returned to the bank of the river just above the location of the Rambler. There they found where a boat had been drawn up to the bank.

“I don’t see how they ever got a boat by us,” Clay argued, “but they certainly did, for they couldn’t have got here first. They must have sneaked up the east shore in the shadows and landed above the Rambler. Are you sure that no boat passed down after Alex left?” he asked of Case. “One might have drifted down without making much noise.”

“I was awake every minute of the time,” Case insisted, “and no boat passed down. When the moon swung around to the south, the whole river was illuminated. I would have seen any craft that passed.”

“Then it is certain that the intruders are still up river, perhaps above the falls, and I am afraid that Alex is where they are. That little rascal is always getting lost! He should have remained on board.”

“Yes, he gets lost,” admitted Case, loyally, “but he always comes out on top in the end. There wouldn’t be any fun if Alex and Teddy were not always getting into trouble. It sort of keeps things moving!”

“Well,” Clay concluded, “the place to look for the boy is, as I said before, upstream. Now, the question is, shall we take the Rambler up?”

“I am afraid the motors would declare our presence,” Case observed, speaking from the deck of the boat, “and, besides, we couldn’t go very far on account of the falls, so, perhaps, we would better go up as far as we can in the rowboat, making as little noise as possible.”

“And what’s the matter with putting Captain Joe on shore?” asked Jule. “He may be able to point out the spot where the men left the river. Anyhow, it won’t do any harm to try.”

“That’s a good idea,” declared Clay, “and I’ll go along with him.”

“I’m afraid you’ll find it pretty rough walking along that bank,” Case suggested, “for the country is rocky and leads up to the plateau above the falls, and small streams may run in from the peninsula. You might have to swim when you wasn’t climbing hills.”