Ned Rector shied a tin can at him, whereat the fat boy ducked in out of sight.
103CHAPTER IX
A MYSTERY UNSOLVED
“But surely whoever was here must have left some trace,” protested Professor Zepplin.
“Perhaps you may be able to find it. I can’t,” answered Tad.
“We’ll all look,” cried Ned.
Tad nodded, and while they were scanning the ground he walked about the outskirts of the camp with his glances on the ground. There was not a footprint, not a thing to indicate that any person outside of themselves had been near the camp. Tad was looking in particular for the strings with which the stuff had been tied to the rope. Not finding these he was certain that some human being had been in the camp.
“We shall have to make the best of it and let it go at that,” he said, returning to his companions. “Shall we go to sleep again?”
“Sleep!” shouted Ned.
Stacy popped his head out to see what the shout was about. He ducked back again upon encountering Rector’s angry gaze.