Penny threw down her napkin impatiently. "Oh, there's no use arguing with you! You always win!"

"I'm not suggesting that your friend Amy is a crook," the detective smiled. "I'm merely trying to teach you to think and not to arrive at conclusions through impulse or emotion."

After the morning's work was done, Penny telephoned Susan Altman to tell her about the Dillon party. Susan was not at home so she walked to Amy Coulter's rooming house where she was admitted by the landlady.

"I'm so glad you came," Amy cried joyfully as she admitted the girl. "I took your advice and shut myself up here in my castle, but it's been dreadfully lonesome."

The young sculptress had been working on a small statue. After Penny had admired it, she covered the figure with a cloth and set it away.

"I'm worried about my Black Imp," she confessed, offering Penny a chair. "This morning a notice appeared in the paper that all contestants for the Huddleson prize should call within twenty-four hours at the Gage Galleries for their entries. I'm afraid to go for fear I'll be arrested."

"It wouldn't be safe," Penny agreed, "but if we're patient for a few days longer I believe the mystery may begin to clear up. In fact, I have an important clue already."

She then told Amy how she had discovered the Rembrandt in Mrs. Dillon's library. The girl was overjoyed to learn the news for she felt that the recovery of the painting would exonerate her. However, her face clouded as Penny mentioned that the picture might be a fake.

"If I were certain the picture was stolen from the museum, I'd go directly to the police," Penny declared, "but until I am sure I must move cautiously."

"I wish I could see the painting. I feel confident I could tell if it's a fake."