[ Charles smiles, nods. He's careful in his handshake, and he notes the injury but says nothing at first -- he's curious, but he's polite enough to work not to let it show. ]

That is perfectly fine a title, yes. Though you may call me Charles.

[ A bit of a pause, then a little chuckle. ] It's rather a specific topic, I've found. Not very many are as fascinated as I.