“I know why you want to get away from here right quick,” he said. “I know about the man you saw in the canyon. He was there when I went in after the rabbit, and there was some one with him. Now, who do think it was? Give you three guesses.

“Give it up?” he went on. “Well, it was Mr. Chester W. Granville!”

CHAPTER XI.—ALEX BECOMES A DETECTIVE.

“It doesn’t seem possible!” Clay exclaimed. “What could have Gran been doing there? Could you hear what they were saying?”

“Not a word,” was the reply; “they talked in low tones.”

“But I thought Gran was on the boat.”

“Well, he left the boat, alone, just after I did. I saw him go across the plank and pass into the canyon. Then he turned in another direction.”

“He was back in the boat when you returned with the rabbit?” asked Clay. “Of course, he must have been. Well, then, he had very little time to visit with that fellow. It is a queer proposition.”

“I should say so!” Alex agreed. “Are you going to say anything to him about it—let him know that we are wise to his doings?”

“I think not,” was the slow reply. “If there is something between the boy and these men, the way to find out what it is, is to keep still and sleep with our eyes open. Strange that we should have a mysterious passenger on this voyage as well as on the one up the Amazon!”