[Arthur doesn't want to see anyone unduly suffer, in his mind even the King's death should not be prolonged. It's more than likely he'd be horrified if he could read her mind.

He can't though, so he nods.]

"I have seen those who would use magic for evil, just as I have been helped by those with no magic at all." [At great risk to themselves.]

"There's water in this cave, I should at least collect that if nothing else."