During all this time Captain Putnam had been doing his best to solve the mystery concerning the disappearance of Jack’s gold watch and chain.  But, though all the hired help and the cadets and teachers were watched and questioned, nothing of importance came to light.  Peleg Snuggers said he had once seen a strange man near the stables, and Captain Putnam wondered if that individual could have sneaked into the school and committed the robbery.

“But if he did that, why didn’t he take more?” he said, in speaking of the matter to George Strong.

“I am sure I don’t know, sir,” answered the teacher.  “For the matter of that, why wouldn’t any thief take more, if he had the chance?”

“I give it up, Strong.  This thing makes me feel sick.”

“Well, we must keep our eyes open,” answered George Strong; and then the conversation changed to the lessons for the next day.

On Tuesday morning, Pepper chanced to go to a bureau-drawer in which he kept his collars, cuffs, neckties and jewelry.  He commenced to look for something and ended by turning out everything in the compartment.

“What’s wrong, Pepper?” asked Jack.  “Lost some diamonds?”

“It’s my ruby scarfpin, Jack.  Did you see it?”

“No, not for some time.  Did you have it in that drawer?”

“I did.”

“When did you wear it last?”

“The night we took dinner with the Fords.”

“Are you sure you put it back when you came home?”

“Positive.  I keep it in this case,” and Pepper held up an empty jewelry case.

“Gracious!  This is becoming interesting!” murmured the young major.  “First my watch and chain and now your scarfpin!” He looked pointedly at his chum.  “Pepper, do you think——­” He stopped short.

“Think what, Jack?”

“Oh, I’d hate to say it, Pepper,” and the young major shrugged his shoulders.

“Were you going to mention Ritter and Coulter?”

“I was.  But maybe it wouldn’t be fair.  It’s a terrible thing to think anybody a thief.”

“That is true.  But maybe they took them as a joke and hid them.”

“That is past a joke.”

Pepper continued to hunt around until it was time to go below.  Then he marched straight to Captain Putnam’s private office.

The captain listened with a sinking heart to what the cadet had to say.  It was terrible to think that a thief was at large in the school and could not be caught.

“You are positive that you had the scarfpin when you came home, Ditmore?” he questioned.

“Yes, sir.”

“And you put it in the case in the drawer?”

“I did.”

“Was the drawer locked?”

“Part of the time.  Sometimes I forgot and left the key in the lock.”

“What sort of a scarfpin was it?”

“It was a sort of a clover effect, of gold, with a ruby and three small diamonds.”