There's nothing wrong with it, though, and the sudden embarrassment surprises John too. It's not good exactly, maybe, but not not good either, just... weird. Out of place. Which is why he shakes his head, waves it all away, and steps over to peer at the tome.

"Latin. You're really going into this."

It's impressive, really, but if anyone would try to work out the very foundation and workings of magic itself, it would be Sherlock.

And it's exciting, of course. That idea. Figuring it all out, and being able to... Well, it's about creating spells, isn't it? Being able to do that would be quite something, and if anyone can, it would be Sherlock. And a bunch of other great wizards and witches, of course, but Sherlock ought to be among them.