Bert and Nan did their studying for the next day, and then Bert went about locking the doors and windows, Mrs. Pry telling him to be especially careful.

“For burglars might come in, now that we’re more alone than ever before,” said the old lady.

“Do the burglars know we’re alone?” asked Bert, grinning at his sister, for neither of them felt any fears.

“They might. You never can tell,” answered Mrs. Pry. “Anyhow, don’t leave any doors open.”

And of course Bert would not do that.

Just before he and Nan went up to their rooms, Bert went to the front door to look out.

“Is the weather doing anything?” Nan asked.

“It feels like snow,” Bert answered. “It’s cold and sharp out, and it’s cloudy. Maybe it’ll snow to-morrow. I hope it does.”

“I don’t,” Nan said.

“Why not?” her brother wanted to know.