I know your methods, sir

I know your methods, sir, and I applied them. Before I permitted anything to be moved, I examined most carefully the ground outside, and also the floor of the room. There were no footmarks."

"Meaning that you saw none?"

"I assure you, sir, that there were none."

"My good Hopkins, I have investigated many crimes, but I have never yet seen one which was committed by a flying creature. As long as the criminal remains upon two legs so long must there be some indentation, some abrasion, some trifling displacement which can be detected by the scientific searcher. It is incredible that this blood-bespattered room contained no trace which could have aided us. I understand, however, from the inquest that there were some objects which you failed to overlook?
Hummer Alternator
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