“Why, we have got him, that’s all,” said he. “I know a dog that would follow that scent to the world’s end. If a pack can track a trailed herring across a shire, how far can a specially-trained hound follow so pungent a smell as this? It sounds like a sum in the rule of three. The answer should give us the⁠—But halloo! here are the accredited representatives of the law.”

Heavy steps and the clamor of loud voices were audible from below, and the hall door shut with a loud crash.

“Before they come,” said Holmes, “just put your hand here on this poor fellow’s arm, and here on his leg. What do you feel?”

“The muscles are as hard as a board,” I answered.

“Quite so. They are in a state of extreme contraction, far exceeding the usual rigor mortis. Coupled with this distortion of the face, this Hippocratic smile, or risus sardonicus , as the old writers called it, what conclusion would it suggest to your mind?”