“Hark! What’s that?” suddenly exclaimed Mabel, who was directly behind Marie.
“What’s what?”
“That noise. Didn’t you hear some one calling?”
They halted—hearts beating so hard that it seemed as if they might be heard by others than the owners.
From the blackness around them came a shout.
“Haloooooo!”
“An owl!” murmured Natalie.
“Maybe a bat,” ventured Alice.
“Oh, you horrid thing! Don’t mention bats!” begged Mabel.
Again came the long-drawn out cry: