“THERE!” SAID JACK, POINTING IN TRIUMPH.

“Mr. Black,” he cried, “I’ve got the man who took the box! Down the cellar! Quick!

“I found the box, with the money still in it, and fixed up an alarm-bell circuit to go off when he came for it,” he explained hurriedly, as the manager stared. In a moment Mr. Black was on his feet and hastening after Jack toward the cellar stairway.

Quietly they tiptoed down. They reached the bottom.

“There!” Jack said, pointing in triumph. And looking, the manager beheld Smith, the express clerk, on his knees beside the furnace, before him on the floor the missing cash-box.

Ten minutes later the manager of the express company, who had been called in, passed out of Mr. Black’s office with his clerk in charge, and the telegraph manager, turning to Jack, warmly shook his hand.

“I am more sorry than I can say to have placed the blame upon you, my boy,” he said sincerely. “And I am very thankful for the clever way you cleared the mystery up.