[Given what Claire had told him of the injury, it's not exactly surprising to see the eye patch, nor the splotches of discoloration mottling his skin.]

That's right. Your friend was concerned about your injury, and rightfully so. And now I can clearly see why.

[Stephen closes his book and gestures for him to come closer. There's an empty chair in front of the desk in which John can sit if he likes; he is certainly welcome to.]

Nothing that a session of magic can't fix, at least for someone who's spent too long poring over the magical texts in this castle with the intention to hone exactly that art. Make yourself comfortable. Should I just call you John?