"Dr. Thornton," he cried, excitedly, "it's my own fault, of course, but I'm afraid I've seen the last of my watch. It's one that father carried for a good many years, and at last gave me. The works are not very expensive, but the case was a gold one."

"How did you lose it?" inquired the principal, looking up over the gold rims of his spectacles.

"Why, I had to hurry to make school this morning, sir, and, as you know, it's a rather long walk. So I carried my watch in the little change pocket in my reefer in order to be able to look at it frequently. I reached the locker just in time not to be late, and forgot and left my watch in the reefer. When I went down just now I found the watch gone."

"Oh, but this is serious!" gasped Dr. Thornton, in dismay. "It begins to look like an assured fact that there is some thief at work. Yet Prescott alone has a key to that locker."

"Prescott is all right. He's no thief," put in Thompson, quickly.

"I agree with you, Mr. Thompson. I consider Mr. Prescott too manly a fellow to be mixed up in anything dishonest. Yet something is wrong—-very wrong. For the safety and good name of us all we must go to the bottom of this mystery."

That, of course, was all the satisfaction Thompson could expect at the moment. He went out to the remainder of his recess, feeling decidedly blue. Nor was Dr. Thornton any less disturbed.

When recess was over, the entire body of students was questioned in the general assembly room, but no light was forthcoming.

"Of course, in view of what has happened," counseled Dr. Thornton, "the young gentlemen will do well to leave nothing of value in their coats in the locker rooms. And while nothing distressing, has yet happened in the young ladies basement, I trust they will govern themselves by what has happened on the young men's side."

Dick Prescott felt much concerned over it all, though he did not imagine that anyone suspected him of any share in the disappearance of articles of value.