“Call in the police,” came from Bess.

“Pooh!” scoffed Cora. “If they couldn’t get back my automobile they can’t find mysterious thieves who enter through locked doors or windows, and vanish into thin air with their ill-gotten gains.”

“Let—let’s go home!” faltered Belle.

“Nonsense!” cried Cora. “We’ll stick it out. It is just getting interesting.”

“That’s all right,” announced Belle, “but suppose—suppose they come in the night, when we’re asleep, and take one of us?”

“Let them begin on Bess,” suggested Jack, with a laugh. “No offense, of course, fair one,” and he bowed, “but you know you could give a good account of yourself if some one did try to walk off with you.”

“Don’t dare suggest such a thing!” cried the plump twin. “I’d never go to sleep if I thought they’d come at night.”

“They do seem to confine their visits to daytime, and to the periods when we are away,” said Cora.

“Which makes it look, more than ever, as if they watched the bungalow and knew just when to take advantage of our absence,” commented Paul.

“Oh, don’t say that!” begged Belle. “Just think—they—they may be watching now!”