What happened down in the dungeons between you and Professor Quirrell is a complete secret, so, naturally the whole school knows.
J. K. RowlingI heard from my dear friend Tiberius Ogden, that you can produce a Patronus? For a bonus point...? Harry raised his wand, looked directly at Umbridge, and imagined her being sacked. Expecto Patronum! The silver stag erupted from the end of his wand and cantered the length of the hall.
J. K. RowlingMerlinโs beard, Harry, you made me jump,โ said Slughorn, stopping dead in his tracks and looking wary. โHow did you get out of the castle?โ โI think Filch mustโve forgotten to lock the doors,โ said Harry cheerfully, and was delighted to see Slughorn scowl.
J. K. Rowling