Stalker disappears, either to talk to the Director or to go punch something. Probably not both.
At various times someone will knock, and a cape or careful non-cape will stop by to answer questions about Earth Bet and ask some probably-repetitive ones about Fairyland. Shadow Stalker apparently did tell the Director about the name eventually, because one of the visitors asks Promise to verify. The Director herself stays away.
At one point, she gets asked whether she minds if some Tinkers try to study what happens when she does sorcery.
Promise has learned from her informative visitors what Tinkers are. "...That is tentatively okay with me."
The Tinkers, when they arrive, look less like nerdy inventor types than people who might have their own action figures. One, a tall man in blue armor, skips straight to business. "I'm Armsmaster. We've heard that what you can do is a different kind of thing from powers, and more versatile than most. Can you demonstrate some sorcery?" As he speaks, he's setting up unrecognizable sensory equipment.
(Armsmaster almost immediately receives a private message from Dragon: I can't understand a word she's saying. It may be something about my telepresence, which I'd rather not explain to her; can you translate insofar as that's possible or should I make my excuses?)
Privately to Dragon, She said the lights and the space where the gate is going to be are sorcery.
And she can understand English without the speaker present. If you want to hide the fact that you can't understand her, speaking should cover it.
"Here's another light," Promise says, holding out her hand; a light appears above her palm.
The instruments continue to report that the light is just light. No other effects, no power source, definitely not natural but well within the scope of powers.
"These aren't turning up anything obvious. When you do sorcery, what outside factors affect it?"
Let her assume I'm here to observe.
Do they affect anything other than sorcery?"
"They might, but not obviously. Some things affect harmonics, more obviously - sorcery has feedback effects with it; living things affect harmonics; other things back in Fairyland like sky islands or crystal deposits or mercury wells can have bizarre harmonic patterns around them."
Do the mercury wells tend to have similar harmonic patterns, or does it vary from one to another?"
"I don't know. I've never been to these in person and the book I read that in didn't include harmonic maps or a verbal comparison."
He unstraps something that looks like a half-length halberd from his back. The head rearranges itself into a rough sphere, and starts swinging from a short chain noticeably faster than a pendulum should. "This has minor exotic effects on some background features of space, but not others. Can you tell if it does anything to harmonics?"
"If you give me a moment to make a quick map of part of the area it will affect while it's not affecting it, and then when it is, yes."
"Of course." It slows down to ordinary pendulum speed, and collapses back into the halberd shape.
"Okay, now I have a map of that square. Does it have to swing? I don't know if that will throw off my second map."
"It can be stable." It rearranges itself again, and Armsmaster holds it steady while the chain lowers the sphere.
"This is different. It's not very different, but it's different, and not in the sweeping ways this room has led me to expect of it. So that thing does affect harmonics, a little bit."
"I could probably build something to have more of that effect. Would it help if I did, or is the change in a wrong direction?"
"The important thing isn't that the harmonics be anything in particular, the important thing is that I know what I'm working with. If you think Vista's power is just spreading out the normal harmonics of this world, that makes a lot of sense; it means that under conditions where she hasn't done anything, all of the slopes are very sharp and change too rapidly for me to adjust and instantly shred sorcery in it. The optimum casting condition would be completely flat or even absent harmonics; I think the natural condition of the world must be chaotic noise."
"If that is what stops people from being able to do sorcery, this is very likely worth trying. How hard is it for humans to learn?"
"No harder than it is for fairies, I imagine, although where this gate will take me I don't know where to find a library and it might take me a while to get books."