He was busily engaged at it when the cabman entered the room.
"Just give me a help with this buckle, cabman," he said, kneeling over his task, and never turning his head.
The fellow came forward with a somewhat sullen, defiant air, and put down his hands to assist.

At that instant there was a sharp click, the jangling of metal, and Sherlock Holmes sprang to his feet again.
"Gentlemen," he cried, with flashing eyes, "let me introduce you to Mr.
Jefferson Hope, the murderer of Enoch Drebber and of Joseph Stangerson." The whole thing occurred in a moment--so quickly that I had no time to realize it.

I have a vivid recollection of that instant, of Holmes' triumphant expression and the ring of his voice, of the cabman's dazed, savage face, as he glared at the glittering handcuffs, which had appeared as if by magic upon his wrists.

For a second or two we might have been a group of statues.

Then, with an inarticulate roar of fury, the prisoner wrenched himself free from Holmes's grasp, and hurled himself through the window.