"The name is not just a cute gimmick. I studied its previous home, concluded that someone must have conjured it away, and looked for anyone who had ordered the necessary ingredients for a long-distance conjuration at about the right time. You were the closest match. There aren't all that many uses for fresh dragon oil, even fewer in combination with frogs' toes. And then, of course, I looked for the best possible place in town to hide something which you don't want a vampire to find, but which they are almost certainly going to anyway - and here we are."

They have arrived at the right house.