They can go see what the roof is like.

The passageways seem to wind up for a few levels - not nearly as many as on the Eastern side of the mountain, they hear, and mostly sticking to the outer shell. Cleverly carved vents let heat and smoke out and light in. The halls remain enormous, airy, the stonework firm and robust. There are any inns fit for humans, actually, beyond the first level - indeed a bit cheaper, especially if they're away from the sunlit passageways, and apparently more geared towards people staying longer term. Fewer humans, though, and more dwarves.

That's good.

Any obvious to make some money with repair services?

Things don't seem to break in public a lot, and the construction's all firm and no one keeps broken things where they can be seen - they can see a few things break if they stick around watching the crowds, though, some of it apparently valuable. There's also any pawn or antique shops with some worn down or broken items.

Are any of the shopkeepers willing to pay if they offer to fix a few items into better condition?

They're a bit skeptical but willing, generally.

Is there a back room they can borrow?

Sure.

Then a few minutes of privacy later, here is a restored gewgaw.

He's a bit suspicious, and pokes the geegaw, but pays them just fine - even tips a bit.

Great. Have they got enough money for a room now?

A small one, somewhere less nice, and two meals.

That's good enough to be getting on with. Library?

There's a small public one near here but the big scholarly ones are on the Eastern side of the mountain, and the person they ask has a vague idea they're somehow reserved for scholars.

That might be a snag. Though maybe they can contrive to count as scholars.

They can at least check out the close one, get a feel for what things are like.

Well lit by flame-less glowing crystals. Very, very thoroughly and neatly organized. Quiet, with thick rugs covering the floor. Designed for easy seclusion with your book.

There's a lot of fiction, here - about half the library - but also a lot of (mostly basic, mostly geared towards education) nonfiction texts.

Where stands the state of science and technology?

Technology - weird, given they also have magic. They're better than Amestris at applying the basic concepts of static engineering, even if their understanding is similar. They don't have widespread electricity, combustion engines, or anything derived from those. Their magic allows them to create glowing stones, but the 'great works' of the Second Age are mostly lost. Apparently, no one lastingly recorded how to make rings that turn you invisible, even though those definitely once existed; no one recorded how to make rockets and airships, either, though those also once existed. Their metallurgy is definitely better than Amestris's. They have the printing press, about as advanced as it's possible to get without electricity.

Science - also weird, actually.

They know about evolution, but consider all life to have been created fairly recently on a geologic scale by the Powers. The dwarves were created from stone by Mahal (one of the Powers) and given sapience by Eru (creator of the universe, who supposedly reserved the creation of sapience for himself). The sun and moon were created later, and this caused an ecological disaster.

They know a lot of chemistry, about even with alchemists - they just lack the technology to apply all of it.

They know a lot of geology, and astronomy, and medicine. They seem to have successfully invented the scientific method, and been mostly stymied from doing anything incredibly impressive with that by repeated localized apocalypses and expulsions. They have extremely good microscopes, which has helped microbiology.

Is their biology basically similar?

They have bones and muscles and nerves all in the same general places, just with fewer bafflingly stupid evolutionary shortcuts - there's some nerves that loop in a really dumb way in humans that are sensibly placed in dwarves, and their eyes are arranged like they were actually designed by someone rather than by a random number generator with too much time on its hands. Their kidneys work a bit differently, too. Their brains are a bit different from human brains but neither civilization is very good at neurology yet. They still breathe in oxygen and breathe out carbon dioxide, and are prone to most of the same diseases as humans (just with significantly less cancer and diseases of old age), and have two lungs and one heart, and need to eat basically the same foods as humans. The picture of a model dwarven cell looks a lot like Amestrian pictures of model human cells, just with less detail.

...A couple arguments in favor of the creation theory.

If they end up staying longer, kickstarting some industries could be worthwhile.

Sounds fun, too, and probably profitable - they can get inventions named after them, maybe.

Rename the combustion engine the bellona.

Heeee. Perfect! Electricity already has an 'el'...

El as a unit of measurement might be better.