It means the Ministry's interfering at Hogwarts.

...at the sight of her mangled body.

So when they arrive at the ninth hole...

Good. Not bad at all, Nigel. Well done.

Welcome! Welcome to another year at Hogwarts.

The dementors will be stationed at every entrance to the grounds.

- Thank you so much. - Not at all. Merry Christmas.

...that a certain dark wizard is at large once again.

Vernon, just look at him! I can't believe it!

Do they use a cane at St. Brutus', boy?

You, on the other hand, have no business wandering the corridors at night.

Third year, he fought off about a hundred Dementors at once.

This is Amos Diggory, everyone. Works with me at the Ministry.

Actually, he sort of screamed at her. It was a bit frightening.

I demand that you leave at once, Sir! You are breaking and entering!

- Don't talk about my mother. - I'll have a go at anyone calling me a liar.

Oh, um, I'd appreciate it if you didn't tell anyone at Hogwarts about that.

Harry, This is Professor Quirrell. He will be your Defense Against the Dark Arts teacher at Hogwarts.

A mark like that only comes from being touched by a curse, and an evil curse at that.