128
THE OUTDOOR GIRLS IN A MOTOR CAR
"What is it?" asked Betty.
"The door—it opened of itself!'
"Nonsense! Perhaps it was not shut, and you pushed it!"
Betty flashed her light forward. It shone on the old door, that was slowly swinging open, seemingly of its own accord. Then a bare and deserted hall was observed.
At that moment there came a vivid lightning flash, and before the thunder could echo Grace cried:
"We're at the haunted house of Shadow Valley!"
