"How do they define 'locked up', can they handle being confined to their home by a big blizzard, can they sail across the ocean - oh, I guess that wouldn't take very long anymore -"

"It takes a while to set in, but a while is like a week or something. I don't think weather conditions do it. They can travel by lightleaper, which involves five days stuck in a ship. I'm pretty sure people marooning others on the Moon specifically to prevent them from going somewhere they'd rather be counts."

"Well. Humans don't die, and I doubt the standards of evidence meet 2179 expectations but most of those people are in fact guilty of, like, poisoning people or illegal lethal duelling or secret dragon-breeding with a dozen casualties or dosing Muggles with love potions for a night and then making them forget it - that's technically legal, but he did one of the memory charms carelessly and that's a Statute violation -"

"I really wasn't planning to take over the world just for fun."

"I didn't think you were."

"Anyway. We're not letting the Elves take 'em home as pets, even if the Elves hate prison."

"If they get all crusadey about it they can have Muggles from one of those Dickensian debtors' prisons and see how that goes first maybe."

"Dickensian?"

"...maybe Dickens is not yet. Charles Dickens was an author -" He looks up some dates. "...who will be born in thirty-four years, whoops, and he wrote some of the more famous novels in the English language."

"I will look forward to his existence. And the Elves can have all the Muggle prisoners they want - Bar, is there any way to get this door anywhere but in the middle of Hogwarts -"

Very occasionally, someone from the same world will also get a Milliways door in one of the rare cases of time passing with the door closed, and it can be used as normal. Otherwise, no.

"Then it'll be really hard to move them unless the Elves can get anywhere on interdimensional transit."

"Or maybe teleportation."

"Can't Apparate in Hogwarts. Some other method might do it."

"Exactly. And be usable by nonwizards."

"I am optimistic about what can be accomplished by locking two of my father in a room with computers and so forth."

"Me too."

"And if he gets the stone sorted they can stay as long as it takes to get it working."

Nod.

"What's Amriac up to?"

"In the backyard playing with her stuff."

And not bothering you, good. "Of course."

"She wants to try something called the draught of living death on poppy garden demons."

"If they're interested, sure."