After a quick tour of this place, I see an astonishing amount of effort dedicated to a grand entrance hall and a few lavishly engraved and designed rooms. This seems odd, because we only have 21 citizens left. On the other hand, when the undead aren't murdering the populace and the zombie sealed under the floor ("Kikrost", they said) isn't clawing at the walls it's surprisingly peaceful in here. Sure, there are clothes everywhere, but our farms are doing great and with such a low population we can last a while. Usually we get some migrants in the spring, but I don't see them yet. Hopefully they'll bring some stone-masons so we can colonize the surface and bring a new reign of peace and prosperity to Crossedhorns.
Meanwhile, the three-slit experiment is being set up, and so is "The Grinder". A giant block of swooshy weapon traps works, but does it have style? No! I plan on sealing off the entrance and re-working this section with lots more pointy spikes and better. Of course, weapon traps cause zombies, and they can jam. Luckily, sitting one z-level below the entrance is an infinite source of groundwater, and further below is a cavern. I think we can work something out involving drainage and auto-cleaning - although it would make the first cavern layer more or less uninhabitable (unless zombies are less tough than I thought - they'll be getting lots of fall damage). Once the defenses are up to snuff, we can focus on making some nifty towers and whatnot.