Something that had been present before the overlay was built and was still present now that the overlay had gone, the way a riverbed persisted after a river dried, the shape of where the dimensional architecture had been preserved in the space itself. Four Fracture sites. The original sites, the locations where the overlay had been anchored, the dimensional apertures that the overlay's energy had kept propped open for three weeks. With the overlay gone, those apertures should have closed, the dimensional boundary closing behind the retreating energy. His Depth Sense said one of them hadn't. The nearest original Fracture site, NV-3, two blocks north of his current position. The aperture was still present, not the full-dimensional seam of an active Fracture, something smaller, something t

