"There's not an obvious size I'd expect but I don't know a ton of physics. And yes, but the best way to do it involves putting satellites in orbit around the planet and I'm not sure what next-best option I should go with given how there were not satellites around the planet at this time."

"If they were fast maybe no one would've noticed them."

"Things up there move really fast and people learn to detect them anyway!"

“Huh. Good for them. How do they do it?”

"Don't know off the top of my head."

“The communications are not very important yet but it’ll help a lot with coordinating people eventually.”

"Yeah, I expect it to be a tractable problem. Uh, until the last couple decades whereupon wireless signals of kinds I know how to use will all be detectable."

“Maybe by then we will mostly be on a faraway world.”

"Yeah, if I can get you set up on Titan no problem at all."

“They won’t check there?”

"There are people living there eventually but not with very much coverage."

“And I guess we already know that default conjugations for people in an area don’t find fairies, at least not while we are fast?”

"Or small, it could also be small."

“Might be good to know which because other worlds might not have paths.”

"They well might not, someone would probably have noticed."

"The conventional understanding of paths is that they're responsive to vegetation. I don't know if there's any of that on Titan."

"Not a speck. Only vegetation? How do the courts in caves work?"

"Some caves have vegetation in them. If you're really patient you can also plant vegetation and then wait for it to grow in a way that creates the paths you need. Areas that are pure rock with no plants won't typically have paths."

"Then we should not expect Titanic paths. Drat."

"We can probably check easily enough whether it's the smallness or the fastness that protects fairies from conjuration, some fairies are big at any given time."

"It only prevents naive conjuration, and I'm no longer a naive conjurer. I'm not actually sure how to parameterize as though I were one in this case."

"Huh, all right. I don't really know what you're doing, mentally, when you conjure things."

"Depends. In the case where naivete matters, it's like trying to get 'all the people in this geographical area at this time', and for some reason a naive demon trying to get that result doesn't conjure and notice any faeries, and I can."

"Huh." Shrug.

"Yup. Very weird, hard to figure out without more demons to test on."