“I don’t know, sir.”

An investigation was made, but, of course, nothing out of the ordinary was brought to light.

“You had better go back to your duty, Fenwick,” said the master of the Hall at last.

“Oh, sir—supposing that ghost comes again?”

“Run up and catch hold of it. You’ll likely find it some joke the other cadets have played on you,” and Captain Putnam smiled broadly.

“A joke!” Mumps looked interested. “Do you think it was a joke?”

“More than likely.”

“Oh, but it looked so real!”

“A ghost can’t look real. You have been deceived. Go back to your duty,” and the master of Putnam Hall returned to his tent, and Mumps resumed his guard duty, with a heart that trembled every time he took a step.

“Gosh! but that was rich!” laughed Andy, when the affair was over.