Vincent,
It's difficult for me to send you letters, seeing as I don't have my own owl, but I've managed to get to the post in Diagon Alley to send this to you.
Remember that plan that I was talking about? Well, I've got it all figured out. With this letter is a small vial of Sleeping Draught. All you have to do is make sure that your uncle drinks all of this Friday evening. I'll then meet you at the Leaky Cauldron and then I'll take care of the rest from there.
I hope that this all works out well. Good luck.
xoxo,
Scarlette