Goodbye Brother
James,
I want to start out by saying that I am so sorry. I didn't want to leave you in the dark about what I'm doing but I had no other choice.
This may or may not come as a shock by the time you are reading this, but I found Regulus. He's alive and working to kill Voldemort and end the war, or at least he is alive at the time I'm writing this.
I promised to help him and in doing so made an unbreakable vow that I wouldn't let him die trying to end the war. So if you're reading this I've either been successful in keeping him safe or I've failed and we are both gone.
If that's the case I am so very sorry James. I know what he was to you and I'm sorry you never felt like you could tell me.
Anyway, if he did survive I want you to know that he is out there. He's not the person we thought he turned into, he's good. That said if he's alive I want you to find him. Take care of him, just like I want him to take care of you.
Growing up I thought love at first sight was a stupid story for naive children, until I stepped on the Hogwarts Express at eleven. I came face to face with you and knew then that we were soulmates, platonically of course.
You gave me the best memories, and joy I didn't think I would ever find. I want to thank you for that.
Take care of yourself, and Bambi, and Red.
I love you Prongs.
Sincerely,
Your brother - Sirius Orion Black.