[Good God. The way Merlin's practically shrinking away from him makes Arthur want to rub at his temples. It seems Merlin still hasn't learned to trust Arthur completely yet. Arthur leans forward.]

I haven't turned you in for being a sorcerer, nor for using magic numerous times within Camelot's borders. It'd be unreasonable if I punished you now for looking into this magical item when it's what you and Gaius have been doing all this time already.

[aaaand Arthur stops, narrowing his eyes.]

Gaius already knows, doesn't he?