Agravaine: How did you know the sorcerer that killed Uther?
Gaius: I'd heard of him.
Agravaine: You told Arthur where to find him.
Agravaine: That suggests you did know him.
Gaius: I was told of a dwelling where he could be found.
Agravaine: Who by?
Gaius: I cannot say.
Agravaine: Have you ever met with him? (Gaius remains silent) It's a simple enough question, Gaius. Have you met him? Yes or no?
Agravaine: And you would be prepared to swear to that?
Agravaine: On oath?
Agravaine: Thank you, Gaius. It's been most informative.