[That reaction is a little worrying to Rideaux—seriously, he hopes you guys haven't been operating without a proper doctor for terribly long—but he'll laugh softly anyway.]

I promise you won't be disappointed by my services. I am quite famous for my vast amount of medical techniques in my world.

[He'll just casually not mention he can't use a lot of them right now, because that's not the point!

The actual answer to his question disappoints him a bit, though.]

What a pity, but I suppose it can't be helped. Just out of curiosity, how long has this mystery persisted?