This relieved the tension a trifle. The others snickered at Biff’s predicament. Frank lit the lamp and in its glow the boys were revealed, shivering in their pajamas. Chet’s round face peeped out above a heap of blankets.

“Owoooooo!”

The dreadful sound broke out again. Chet dived beneath the blankets.

“That’s the queerest howl I ever heard,” declared Biff, rubbing his injured toe. “It certainly isn’t the wind.”

“It certainly isn’t a human being,” said Frank.

“It can’t be a dog,” volunteered Joe.

“Nor a cat.”

“Then what is it?”

“Ghosts!” bellowed Chet, from beneath the blankets. “Put out that lamp.”

Frank, however, raised the lamp on high and began to prowl about the cabin.