"So," says Bella to Rúmil one afternoon, "a few weeks ago I told myself that if in a few weeks I had not come up with an actually good way to bring up a thing I would just mention it anyway on the grounds that if it came up somehow later and I had not done so that would be weird."
She starts writing Sibyl a note - hasn't been replied to yet, maybe Sibyl's not checking her messages for the next hour - "I can't actually distinguish between 'in Telperion', 'in Materia', 'in Warp', and 'went through Warp to somewhere Warp-adjacent' - I could go to Telperion and try from there to triangulate but we do actually from a triangle with it and Materia so that's still several places he could be without it being distinguishable..."
"Yeah. I guess in a pinch we could ask Joy to find some boring off of Telperion and triangulate from there too."
"We do have the automaton army for the Shine Silmarils set to go, or maybe there's something figured out with the four Silmaril set that'll do for a Maia even if they don't have it up to Vala-killing yet..."
"And you can go sit in Sibyl's palace where she can kill any unauthorized Ainur visitors having spotted them coming an hour in advance while all of this is going on." Squeeze.
"Some things interfere with her precognition - other precogs, Erus, worldleapers, Gem's wish granter - but Maiar aren't one of the things - so he's using wizardry that does antidivination, directly or by doing divination of its own -"
"Do we have another way to narrow him down? If he's using wizardry that does antidivination -"
"When he kicks Sibyl out of precognition is a clue but right now the earwires are indifferent to spatial location. Joy maybe if his antidivination doesn't block her targeting. Demons likewise."
"Let's not risk Joy unless the antidivination covers demons - which'd also mean he knows about the peal and is being careful of us in particular, instead of just being broadly careful -"
"Yeah - I don't think we've run into anything that looks like his handiwork -"
"He might have just independently parameterized for Warp, I don't know what he would have been looking for -"
"...lot of people, maybe, that'd probably get you Warp. We could go there - only once we've done everything more urgent - and check if that does in fact take you to Warp - if it's not that I don't know what, it's not impossible he followed us -"