Here is an extract from The Speckled Band by Sir Arthur Conan Doyle

Holmes chuckled heartily. "Your conversation is most entertaining," said he. "When you go out close the door, for there is a decided draught."

"I will go when I have said my say. Don’t you dare to meddle with my affairs. I know that Miss Stoner has been here. I traced her! I am a dangerous man to fall foul of! See here." He stepped swiftly forward, seized the poker, and bent it into a curve with his huge brown hands.

"See that you keep yourself out of my grip," he snarled, and hurling the twisted poker into the fireplace he strode out of the room.

"He seems a very amiable person," said Holmes, laughing. "I am not quite so bulky, but if he had remained I might have shown him that my grip was not much more feeble than his own." As he spoke he picked up the steel poker and, with a sudden effort, straightened it out again.

It is clear that Sir Arthur was unaware of work hardening...

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