Dumbledore frowns but takes a seat at his bedside. "You recall what I said about part of Voldemort’s soul clinging to you?" Harry wants to bite back that he would never forget that betrayal, but he simply swallows thickly and nods. "Well, putting a part of one’s soul in an object makes it something called a Horcrux and it enables that person to...evade death." Harry refuses to let himself react, though his thoughts spiral with the possibility that he was the reason that Voldemort had been able to return. "Voldemort, you see, had several. You were the last and were, I think, accidental. I have been searching out the others, but...while it seems I have been able to find their locations, I have not been able to find the objects. The signatures of the dark magic are left behind, but it seems the Dark Lord is one step in front of me."