"Why did they go off and leave it?" asked Mollie.
"That's the mystery of it," admitted Betty. "It's like the mystery of the five hundred dollar bill. We've got to solve it."
"Perhaps—" began Amy in a gentle voice.
"Well?" asked Betty encouragingly.
"Maybe the lady was upstairs shutting the windows when she saw the storm coming, and she fell, or fainted or something like that."
"That's so!" exclaimed Mollie.
"We'll look," decided Betty.
"Betty!" chorused Grace and Amy.
"Why not?" the Little Captain challenged. "We've got to get at the bottom of this."
"But suppose we should find her—find some one up there in a—faint," and
Amy motioned toward the upper rooms.