Chapter 12: A Shadow on the Wall

⁠​​​‌​​​​‌‌​​​‌​​​‌​​‌‌​‌‌​​‌​​‌​​​​​‌‌‌​​​‌‌‌‌​‌​​​‌​‌​‌‌‌‌‌‌‌​​⁠In the twenty hours or so at his disposal Inspector Birch had been busy. He had telegraphed to London a complete description of Mark in the brown flannel suit which he had last been seen wearing; he had made inquiries at Stanton as to whether anybody answering to this description had been seen leaving by the 4.20; and though the evidence which had been volunteered to him had been inconclusive, it