"That's just what I wanted to speak with you about, sir," the boy remarked, with considerable eagerness. "Now the chances are that, having once made a raid on our store tent, this monkey will come again another time, perhaps even to-night."

"That sounds reasonable," replied the scout master, nodding his head. "By the way, I just happened to remember the monkey's name. It fitted him pretty well, too, as you'll admit when you see him. Diablo it was."

"Just think of it, sir, just the name Ginger gave him, too. But Mark and I have decided to set a trap to catch him. We'll fix it so that if the monkey tries to enter the store tent again he'll set off a trigger, and some queer results will follow. For one thing he'll find himself caught up in the loop of a rope, and held, kicking, off the ground until we can come to corral him. Then, if it happens to be in the night, the falling of the trigger will set a flashlight going, and Mark's camera, placed for the occasion, will take a picture of the trespasser."

"That sounds fine, Elmer," laughed the scout master. "Now, I leave the matter in your hands entirely. Do what you think best, and I wish you success."

"How about telling the boys, sir?" asked Elmer.

Mr. Garrabrant thought it over a moment.

"Perhaps you'd better take the whole bunch into your confidence," he said, presently. "They are deeply interested, you know, and if kept in ignorance possibly some one might stumble across your plans, and upset every calculation."

And so, when Elmer returned to the fire, he had the entire bunch listening, their eyes round with wonder, as they learned what had been discovered, and also of the bright plans their chums had arranged looking to the capture of Diablo.

Only Ginger was evidently disturbed. He scratched his head as he listened, as if he could hardly believe what he saw had been of this earth, and the idea of Elmer being so rash as to want to try and make a prisoner of the Evil One gave the ignorant negro a cold shiver. Doubtless he would make sure to find a snug place to sleep that night, where nothing could get at him. His mind was still filled with foolish notions concerning that "chariot of fire" in which he might be carried out of this world into the Great Unknown.