“I heard that one sing all right,” he said, as he banged the door shut and slipped the bar in its place.

“Now we’ve got to watch mighty close at those peep holes,” Bob declared.

“And I, for one, don’t think we ought to hesitate to shoot if we see one of them trying to set fire to the place, not after that last shot,” Rex declared.

“I hardly think they’ll try it again,” Bob said. “I kicked all that stuff they had piled up away, and I don’t believe they’ll risk it again, now that it’s getting light.”

“Mebby not,” Jack broke in, but we’ll play it safe and not give ’em the chance.”

Rapidly the light increased, and soon they were able to see plainly for some distance.

“I wonder if they’ve got any more tricks up their sleeves,” Jack said, as he took his eye from the hole.

“I’ll say they have,” Bob replied almost immediately.

Even as he spoke a slight sound as of something striking on the roof was heard.

“What was that?” Rex asked.