“Have you been to Lake Caboy before?” questioned Pepper.

“Yes, we were up there two years ago, for a week,” answered Laura. “We stayed at the old hotel that was burnt down—a place near the old Robertson mill. You’ve heard of that place, haven’t you?”

“No.”

“It is said to be haunted.”

“Haunted!” cried all of the cadets in chorus.

“Yes. We never went very near it, for we were afraid.”

“We’ll have to investigate that mill,” said Dale. “I don’t believe in ghosts.”

“We had almost forgotten about the old mill until yesterday,” went on Flossie. “Then the strangest kind of a boy asked us about it—a tall, thin boy.”

“A tall, thin boy!” cried Pepper. “Did he tell you his name?”

“Yes, Bert Field.”