"Dear Wisty, Siobahn, and students,
After weeks of travel and following leads, I've found the person I was looking for: the thief who stole the Quidditch World Cup trophy! He was very reluctant to talk, quite angry and I had to defend myself. I'm sorry to say there won't be getting any information out of him anymore, and that's a problem because he's hidden the trophy somewhere. I gathered all of the personal belongings he had with him before his sudden demise, and am enclosing them in this package. Please take care as I haven't had time to inspect them for magical qualities beyond the obvious. See if you can identify where the trophy might be hidden. I will be staying at a low-profile inn awaiting your conclusion. Just send a note back by this same owl--she knows where to find me.
Please feel free to work with your teammates to figure out this last and most important clue! The deadline is midnight Wednesday, PST.