Was Harry's ever confirmed? -- Rodolphus 17:03, September 15, 2009 (UTC)

Harry's what? --  Seth Cooper  owl post! 17:06, September 15, 2009 (UTC)

Oh, sorry. I´ve forgotten a word. Harry´s theory that the Dark Mark was needed to enter the tower. -- Rodolphus 17:09, September 15, 2009 (UTC)

No, but it is the most likely explanation to why the Order couldn't pass through it and Snape (who came up much later than the barrier was cast) could. My only question is how could Greyback climb up the tower if that theory is correct? --  Seth Cooper  owl post! 17:16, September 15, 2009 (UTC)

We could write a comment about it in the Behind the Scenes section.--Rodolphus 17:18, September 15, 2009 (UTC)

"The Malfoy boy vanished, he must have slipped past, up the stairs... then more of them ran after him, but one of them blocked the stair behind them with some kind of curse..."
—HBP, ch.29, p.620[src]
I believe the implication is that one of the Death Eaters in that group cast the curse behind them as they went up to meet Draco. Greyback wouldn't have had to go through it (at least not on the way up). - Nick O'Demus