Penny gazed up but could see nothing amiss. Warm sunshine was pouring through the closed skylight which covered half the ceiling area.
“What ails you, Elda?” she asked. “Why did you scream?”
“The skylight!”
“What about the skylight?” Penny demanded with increasing impatience. “I can’t see anything wrong with it.”
“Only a moment ago I saw a shadow there,” Elda whispered in awe.
“A shadow!” Penny was tempted to laugh. “What sort of shadow?”
“I—I can’t describe it. But it must have been a human shadow. I think a man was crouching there.”
“Nonsense, you must have imagined it.”
“But I didn’t,” Elda insisted indignantly. “I saw it just before you opened the door.”
“Did the skylight open?”