*roll, roll, roll*
Skaith: [sblock] You sit down with the pilfered documents and set to work. The schematics are extremely detailed, so you don't think you'll even need to visit the Orrery itself to check you results. Confirming the locations of the bent pins with your partners (well, close enough, anyway), you try to trace where the mysterious blank spot would be.
After an hour or so of work, you think you could find it. It's several miles away, though, and you have no real idea whether or not the location is within the city or in the dangerous outlands. Judging from the extent of the damage, though, it doesn't look like anything much larger than a simple portal could manifest in the area and still be hidden. Well, maybe something a little bigger. It's hard to tell since you haven't studied the ways of the planes except incidentally while learning the various nuances of arcane theory.
As you start to pack up the papers, you notice something else: a notation at the bottom of the primary design schematic. You ponder it for a while until it comes to; this is a specification for a very precise alchemical alloy of copper, adamantine, and mithral. Two things nag at you about this:
One is that, besides being worth a fortune, you suspect the alloy would be magically active somehow. You've been told that the Orrery isn't magical though; everyone in the city knows that. Strange that they would use such a material, then. And it's no wonder that nobody would notice any latent magic, what with the very active wards on the Orrery.
The second thing is that the alloy seems to retain all the strength of the base adamantine. Bending it, even a very thin part of it, would be... hard. Very hard. The thought that a coterminous imp could manage it while surrounded by some of the deadliest wards in the city just doesn't add up. [/sblock]
Hrm. First post-hiatus post and it's all for Skaith.

Hopefully he'll have something interesting to say to the rest of you, though. (Note also that Skaith can just tell the others everything, in which case Ashy can just direct everyone to read this spoiler.)