At first Susan hung back, but when she found that Penny was determined to investigate the garage alone, she reluctantly followed her chum down the path.
Cautiously, they peeped into the garage. It appeared to be deserted.
"I'll get Dad's flashlight from the sedan pocket," Penny whispered.
She tiptoed across the cement floor. Groping about inside the car she found the light, but before she could turn it on she was startled to hear a slight sound overhead.
Penny's heart began to beat a trifle faster. She was almost certain that someone was hiding in the little room above the garage. In former years it had been occupied by a chauffeur whom Mr. Nichols employed, but now that the detective drove his own car it was used only for the storage of a few old boxes and trunks.
"Don't you dare go up there!" Susan whispered tensely, sensing the thought in her chum's mind. "It isn't safe."
"It's safe enough if you stand guard here at the door," Penny insisted. "If anything goes wrong scream for Mrs. Gallup."
Before Susan could stop her she tiptoed across the cement floor and quietly crept up the stairway leading to the storage room.
Reaching the top step Penny paused to listen. She could hear no unusual sound, yet a certain intuition warned her that someone was in the room.
Systematically, she flashed the beam of her light over the walls. Nothing appeared amiss.