“Then that proves the chambermaid’s key was used?”
“It looks like it; but in that case the chambermaid herself used it, for if you remember in her evidence at the inquest she said the key which she wore on the chain attached to her belt had never been out of her possession all day. She volunteered that evidence which is so damning that she would never have said it except on the assumption of its entire truth and her absolute innocence when she easily might have overlooked the conclusion it pointed to. So I don’t think the chambermaid’s key was used.”
“Then there must be another key?”
“Wait a bit, Yardley. Suppose that murder was premeditated? The murderer would not have done it without making arrangements, and thinking out his plans and seeing that they were possible. You can’t walk bli
