Corbett leads you away from your place, into the deeps. You cross over the bridge, an old thing made out of large salvaged chunks of asphalt, laid on top of rusted out cars, in order to create a path over an underground river which separates the daylight portions from the deeper portions in a visceral way. The water rushes past, cold and furious as always. Some drink from it, but most try to avoid it for other sources. The water in the river is believed to flow from sources Above, from which some of the megafauna drink. The riverwater is probably contaminated, then, and dangerous. Or so goes the popular belief, anyway. Not too many willing to test it. Swimming in the river is a blatant way to ask for death, too, what with its speed.
You cross the bridge, and now you're moving through the deeps. The phosphorescent lichen and moss down here is multicolored; the deepers save their worrying about colors for their own domiciles. It's not terribly bright, but it's bright enough to see by and move by. The deeper sections aren't as wide open as the daylight sections, with their single large tunnel. Instead, there are a number of smaller tunnels, interweaving, criss-crossing. There is one central chamber to the deeper tunnels, before they descend into the ruins from Before.
You move through some of the deeper tunnels, led by Corbett. You pass a few pale-skinned deepers on their way to whatever recreation awaits them; deepers aren't typically ones for hard work. Eventually, you arrive at a doorway, cut into the dirt and stone. It's in a tunnel (think neighborhood) of the deeps that isn't terribly upper class, or well-maintained, or populated.
Corbett motions you inside. "Clarion's inside." Then he seems to think for a moment, before saying. "A word, Shade, before you go in?"