Lifting her hand, she uncovered Foxen and skipped quickly off into the sprawling maze of Rubric. It was barely a minute’s work to find a copper pipe with the right kind of cloth wrapping. But finding the perfect place, well, that was the trick, wasn’t it? She followed the pipe through the round red-brick tunnels for nearly half a mile, careful not to let it slip away from her among the countless other twining pipes.

Then, with no hint of warning, the pipe kinked hard and dove straight into the curving wall, abandoning her. Rude thing. There were countless other pipes of course, but the tiny tin ones had no wrap at all. The icy ones of burnished steel were far too new. The iron pipes were so eager as to be almost embarrassing, but their wrappings were all cotton, and that was more trouble than she cared to bother with today.

So Auri followed a fat ceramic pipe as it bumbled along. Eventually it burrowed deep into the ground, but where it bent, its linen wrap hung loose and ragged as an urchin’s shirt. Auri smiled and unwound the strip of cloth with gentle fingers, taking great care not to tear it.

Eventually it came away. A perfect thing. A single gauzy piece of greying linen, long as Auri’s arm. It was tired but willing, and after folding it upon itself she turned and pelted madly off through echoing Umbrel, then down and down into The Twelve.

The Twelve was one of the rare changing places of the Underthing. It was wise enough to know itself, and brave enough to be itself, and wild enough to change itself while somehow staying altogether true. It was nearly unique in this regard, and while it was not always safe or kind, Auri could not help but feel a fondness for it.

Today the high arch of space was just as she’d expected, bright and lively. Sunlight speared down through the open gratings far above, striking down into the deep, narrow valley of the changing place. The light filtered past pipes, support beams, and the strong, straight line of an ancient wooden walkway. The distant noise of the street drifted down to the far below bottom of things.

Auri heard the sound of hooves on cobblestones, sharp and round as a cracking knuckle. She heard the distant thunder of a passing wagon and the dim mingle of voices. Threading through it all was the high, angry cry of a babe who clearly wanted tit and wasn’t getting any.

At the bottom of The Yellow Twelve there was a long deep pool with water smooth as glass. The sunlight from above was bright enough that Auri could see all the way down to the second snarl of pipes beneath the surface.