"I don't have many of those left to give out."

"I'm not in the market for a continent. If you want wings you need to be done growing and certain you care to keep them first."

"Okay - Timothy, what -"

"Cam is from the year 2179."

"That's the most important thing that has ever happened."

"I think you could make a case for the discovery of fire."

"Not if you guys were remotely efficient - what can you do, what do I need to learn -"

"There's a confounding factor here where my world also has a different magic system."

"Huh. How? Is your magic system the one that does time travel -"

"No, this location is a separate thing."

" - okay -"

"I wrote Father. Things get significantly nicer for Muggles in the future, we want to roll things out as quickly as possible without enabling certain institutions which are supposed to die very shortly. Did you have hypotheses on why electric devices don't work at Hogwarts, it turns out to be important -"

"Told you so. Likeliest explanation is that the lightning ward dissipates inorganic concentrations of electric charge, we can lobby to have it fixed if you stop hoarding your political capital -"

"There are no resources I am holding back from this, promise."

He bounces into his brother's arms. "Whatdoyoudo with electricity - is there something I should read -"

"There is nothing entitled A Wizard From 1802's Guide To Electricity but I gave your brother some books, you can have copies too if you like." Books.

"You can conjure books? Do they not have copyright charms -" he snatches them -

"Different magic system. No such thing as copyright charms," says Cam. "I don't actually know if a copyright charm is the right kind of thing to obstruct me."

He flops down and starts reading. 

"...anyway. I can write a petition to get electricity working in Hogwarts but that's probably not the first thing we should be doing."

"Are you imagining getting started with or without me on hand, different implications there."

"What are you comfortable with?"

"I mean, it's much faster to do most things with a demon around, I'm just contemplating logistics, don't know how long you want to wait."

"Conveniently if I keep the door closed there aren't even people dying while we make up our minds. We might as well test whatever's useful first, possibly with the exception of keeping the door open long enough to fetch my father because he'll think of things I won't."

"Yeah, that seems worth it."