“And you might add of the attempted murder of one Sherlock Holmes,” remarked my friend with a chuckle. “To save an invalid trouble, Inspector, Mr. Culverton Smith was good enough to give our signal by turning up the gas. By the way, the prisoner has a small box in the right-hand pocket of his coat which it would be as well to remove. Thank you. I would handle it gingerly if I were you. Put it down here. It may play its part in the trial.”

There was a sudden rush and a scuffle, followed by the clash of iron and a cry of pain.

“You’ll only get yourself hurt,” said the inspector. “Stand still, will you?” There was the click of the closing handcuffs.