He tried to think of some way to make Mark go away.

But he didn't offer to put the lights out and Mark wasn't going to ask him to.

And then you're well again; even the mark goes away.

Mark went to his son's room to tell him to hang up and go to bed.

It was later revealed in book 10 where she and Mark went.

He let Mark go and stood back, both hands in the air, empty.

A mark that hadn't been there when he'd gone to bed.

These marks can last for weeks or months and go away on their own without any treatment.

Mark went into the tent to speak to his son.

The Mark was going to kill him, and he didn't know how to stop it from happening.