I require a meeting with you: normally I'd simply come and visit you, but it is important that nobody sees us, or traces this back to youme you. Because of this, I would like for you to meet with me outside "Mabel's Curios" in Maida Vale. It's a disgusting little Muggle place that doesn't seem to have seen a dustcloth in ten years, but nobody of any import takes residence around there...although I think I recall Gilderoy Lockhart not being too far. I hope he does stumble across us, actually: it would give me reason to kill him.
I digress. Meet me at 2pm, on Friday. Bring your wand; I imagine you'll need it.