Nothing more happened that night. The girls, tired from their journey, were glad to tumble into bed early. They all slept in one house, which contained only sleeping rooms, and, because of the smoke, which was still being blown across the lake when they went to bed, windows had to be closed. The house was ventilated by leaving a big door open in the rear and on the side away from the wind and the smoke, and of course all the doors of the sleeping rooms were also left open.

"I'm awfully sorry that smoke is blowing this way," said Dolly. "Look here, Bessie, there's a regular porch running all the way around the house. And do you see these screens that you can let down? I bet they sleep out here."

"They do," said Eleanor. "This sleeping porch arrangement is one of the very best things about this camp, I think. But I don't see how we can use it to-night, for the smoke is much too thick."

So they regretfully closed their windows. And in the morning they found that visitors had been at the house during the night. Every window was firmly closed from the outside, wedges having been driven in in such a fashion that it was impossible to open the windows from within. The doors, too, were barred in some manner.

"That's a joke those girls from the next camp played on us!" cried Dolly, furiously. "Look there! They must have done it. No one else could have managed it."

The house resembled nothing so much as a hive of angry bees. The girls buzzed with indignation, and loud were the threats of vengeance.

"How are we going to get out?" cried Margery, indignantly. "What a wicked thing to do! Suppose the place had caught fire? We might all have been burned up just because of their joke!"

But Bessie had busied herself in seeking a means of escape instead of planning revenge, and now she called out her discovery.

"Here's a little bit of a window, but I think I can get through it," she said, emerging from a closet that no one had noticed. "If you'll boost me up I'm pretty sure I can get out."

"But you'll only be on the porch when you do get out, Bessie," said Dolly.