To the Dark Lord:

I know I will be dead long before you read this
but I want you to know that it was I who discovered your secret.
I have stolen the real Horcrux and intend to destroy it as soon as I can.
I face death in the hope that when you meet your match, you will be mortal once more.

R. A. B.

- Harry Potter and the Half-Blood Prince by J.K. Rowling