“I’ve seen that stone before,” he murmured, as he turned it over in his hand. “It doesn’t belong to any of our folks. Maybe it is Fred’s, or Hans’.”

With his find in his hand he entered the house, where the others were just sitting down to the table to eat. He held the stone up to view.

“Any of you lose this?” he asked, and looked at Fred and Hans.

“Dot ain’t vos mine,” declared Hans, readily. “Vot vos it, a stone from a preastbin?”

“I guess it is from a watch locket,” said Tom.

Fred looked at the stone and started.

“Let me see it!” he cried, and held it close to the light. “Well, I declare!” he gasped.

“What about it, Fred?” asked Dick and Sam, in a breath.

“I don’t know who this stone belongs to, but I do know that Tad Sobber used to wear one just like it, when he went to Putnam Hall!”

CHAPTER XVI
SOMETHING OF A CLUE