Don dropped the cup over the edge of the roof and it fell to the ground. It was still boxed and he had no fear that any harm would come to it. Terry was already in the tree and swinging down toward the ground.

Jim, leaning down to pick up the box, felt himself gripped by a strong hand, which fastened itself on his shoulder. Before he could cry out he was dragged upright, to find himself in the grasp of the caretaker. Terry landed at the foot of the tree and was immediately seized by the other hand of the man. So taken by surprise were they that for the moment they uttered no sound.

“Goodnight!” flashed through the mind of the red-headed boy. “The end of a perfect day!”

Chapter 23
The Mystery Is Solved

It was a black moment for the two cadets in the grasp of the caretaker.

With the cup in their possession and the task to which they had set themselves almost successfully completed it was little short of heartbreaking to miss the mark in this fashion. The man who held them was a big and powerful man and they knew by the iron grip upon their shoulders that resistance was out of the question. It was possible for them to put up a fight, of course, but it would probably take them so long that the entire effort would be useless.

Terry was the first to recover his wits. The man who held them was not looking up into the tree; he looked in grim satisfaction at them and apparently had no knowledge of the presence of Don above him. Terry realized that the other must be warned quickly.

“Well, Mr. Caretaker,” he said, loudly. “You seem to have taken my friend and me prisoners. What are you going to do about it?”

“I’m going to run you kids down to the town lockup in a mighty big hurry and put you behind the bars for housebreaking,” the man replied.

A very slight scraping noise in the tree above them ceased abruptly as the sound of the different voices could be heard on the night air. For a second there was an agony of doubt in Terry’s mind, but the man did not look up.