By this time, Rosanna, overcoming her fear, crept beside her friend. They huddled together, listening.
“It’s an organ. I’m sure of it,” Penny whispered. “But where can it be hidden?”
“I’m afraid of this place,” Rosanna chattered. “Let’s lock the bedroom door and leave in the morning.”
Penny made no response. For that matter she did not even hear for she was intent upon trying to localize the sound of the music. Never inclined to be superstitious, she had no thought that the old house was haunted. She felt certain that the ghost-like music was man made.
“This house must have a third floor or an attic,” she declared softly. “Let’s see if we can find our way up.”
“Never!”
“Then I’m going alone.”
Penny started off down the hall. Rosanna hesitated, and then, unable to watch her friend walk into danger alone, hurriedly followed. Halfway down the hall she reached for the electric switch but Penny caught her hand before she could turn on the light.
“Don’t! It would give warning that we’re coming.”
Groping about in the dark the girls went past Mrs. Leeds’ bedroom and the one occupied by the stranger. Penny noted that the doors of both were tightly closed. At the end of the hall she found still another door. Gently she turned the handle and opened it. A steep flight of stairs led upward.