Charles Dickens’s letter opener with the paw of his cat, Bob, 1862. Berg Collection.
Does the handle of that letter opener remind you of something? Perhaps something feline? It's Charles Dickens' letter opener and the handle is the paw of his pet cat, Bob. I'm assuming Dickens preserved the paw because he loved the cat. You can see it at the New York Public Library Exhibition celebrating their 100th anniversary.Link - Via Book Of Joe
http://www.neatorama.com/2007/05/12/using-a-rabbit-as-a-letter-opener/