- Harry's having more nightmares. Or are they nightmares? They seem to be nasty memories of Voldemort's, so maybe he's back inside Voldemort's thoughts again?
- Luckily, he wakes up before we have to see too much of Voldemort's bad behavior.
- He goes upstairs and explores one of the rooms.
- He finds a book by a woman that he, Elphias, and Ron's aunt were discussing at the wedding: Bathilda Bagshot.
- It turns out that the room belongs to Regulus Arcturus Black. R.A.B. Hey, those were the initials of the dude who stole the Horcrux at the end of the last movie. Well, at least that mystery is solved.
- Harry shares his discovery with the others. While they are pondering what it means, they hear a noise and realize they aren't alone in the house: Kreacher the house elf is there. They quiz him about the whereabouts of the real locket/Horcrux.
- Kreacher says that Mundungus (remember? The thief that was partnered with Moody and then abandoned him?) took it. Harry orders Kreacher to find him.