Joe shook his head. It was all equally past his powers of comprehension.

Nothing happened up to the end of the two hours. Then, while Joe remained outside alone, for a few moments, Halstead went to call Mr. Tremaine. That gentleman and Dixon soon appeared to take up the guard work, which would last until within two hours of daylight.

“Tremaine, can you keep the watch here by yourself, for a while?” inquired Oliver Dixon, in an undertone.

“Yes, of course. Why?”

“Then I want to slip away presently. I won’t do so at once because I don’t want to attract attention of anyone who may be watching us in the woods. Yet I want to get into the woods, to hide and watch there.”

“You evidently are not afraid to go into the creepy places,” smiled the host.

“Of course I’m not,” rejoined Dixon. “What I want to do is to see if I can’t trap some of the human beings who are at the bottom of this nonsense.”

“Try it, and good luck to you, my boy,” agreed Tremaine, cordially.

Some time later, Oliver Dixon succeeded in slipping quietly away under the trees. Not even Henry Tremaine knew quite when it was done. After that, an hour passed, during which the owner of the bungalow patrolled alone about his grounds. Then with startling rapidity there came from the woods the sound of four rifle shots.

“Dixon must have stumbled into something!” muttered Henry Tremaine, wheeling and running towards the spot from which the shots seemed to come.