He could tell at once that they carried different sorts of bubble bath mixed with the water though it wasn't bubble bath as Harry had ever experienced. One tap gushed pink and blue bubbles the size of footballs; another poured ice-white foam so thick that Harry thought it would have supported his weight if he'd cared to test it; a third sent heavily perfumed purple clouds hovering over the surface of the water. Harry amused himself for a while turning the taps on and off, particularly enjoying the effect of one whose jet bounced off the surface of the water in large arcs.

When Filch wasn't guarding the scene of the crime, he was skulking red-eyed through the corridors, lunging out at unsuspecting students and trying to put them in detention for things like "breathing loudly" and "looking happy.

I want to fall in love with something in the way I fell in love with the idea of Harry before I write anything else.

The poor things keep calling in those – those pumbles, I think they're called – you know, the ones who mend pipes and things – " "Plumbers?" " – exactly, yes, but of course they're flummoxed.

We are only as strong as we are united, as weak as we are divided.

Half an hour later, each of them had been given a complicated circular chart, and was attempting to fill in the position of the planets at their moment of birth. It was dull work, requiring much consultation of timetables and calculation of angles. “I’ve got two Neptunes here,” said Harry after a while, frowning down at his piece of parchment, “that can’t be right, can it?” “Aaaaah,” said Ron, imitating Professor Trelawney’s mystical whisper, “when two Neptunes appear in the sky, it is a sure sign that a midget in glasses is being born, Harry . . .

You see what you expect to see, Severus.