It was not a verbal remark, but a proceeding in dumb-show, and was pointedly addressed to me. He stirred his rum and water pointedly at me, and he tasted his rum and water pointedly at me. And he stirred it and he tasted it; not with a spoon that was brought to him, but with a file…”I think I’ve got a bright new shilling somewhere in my pocket, and if I have, the boy shall have it.” He looked it out from a handful of small change, folded it in some crumpled paper, and gave it to me. “Yours!” said he. “Mind! Your own.”
– Charles Dickens
Great Expectations, Chapter 10. When Pip meets Joe in the Three Jolly Bargemen tavern he sees a mysterious stranger stirring his rum and water with a file and not a spoon. Pip recognizes it as the same file he gave years earlier to convict Magwitch which he used to cut off his leg irons. The stranger gives Pip a shilling wrapped in two pound notes, a large amount of money in those days. This foreshadows Pip later learning that Magwitch has been his benefactor all along and the great shame this triggers in him.