"I had to dive into this frozen lake, to rescue Harry and retrieve the Sword of Gryffindor. The locket was around his neck and attacking him, Hermione, intent on drowning the poor fellow. It was that action that made Harry convinced that it had to be me who destroyed the locket. We set it on a rock and Harry then opened the locket using Parsletongue. All I remember is briefly seeing these red eyes inside the thing..."