Every time we remember that the Harry Potter series is over (for good) we cry a little inside which is why we eat up every detail surrounding Harry and his mates. The Order of the Phoenix, the fifth book in the series, was responsible for introducing us to the rather hateful Dolores Umbridge (and her obsession with cats). As fans will know, Harry, Ron and Hermione ran riot around the Department of Mysteries and in the midst of the chaos, Bellatrix Lestrange killed Sirius. However, in a bid to race through the book and find out if Vodemort had actually returned, it appears there was one important detail which is only getting attention now. Horcruxes enter Harry Potter land in book six but it seems that the trio may have discovered a Horcrux in The Order of the Phoenix without realising it. The passage reads: "They found an unpleasant looking silver instrument, something like a many-legged pair of tweezers, which scuttles up Harry’s arm like a spider when he picked it up, and attempted to puncture is skin. Sirius seized it and smashed it with a heavy book entitled Nature’s Nobility: A Wizarding Genealogy. There was a musical box that emitted a faintly sinister, tinkling tune when wound, and they all found themselves becoming curiously weak and sleepy, until Ginny had the sense to slam the lid shut; a heavy locket that none of them could open; a number of ancient seals;…" The folk over at Buzzfeed pointed out that the locket described here could well be the locket that Dumbledore and Harry discovered in Harry Potter and the Half-Blood Prince. Just in case you need a little memory refresh, J.K. Rowling described a Horcrux as a part of someone's soul that's transferred to an object after killing someone. Voldemort split his soul in seven different pieces and placed each part in a different object so that even if he died, part of him would live on essentially. So there you go. J.K. Rowling just keeps on surprising us.