Rhys brought up a rendering of the habitat ring and zoomed in on the whitish segment at its top. Their projected route was superimposed as a crisp green arc that curled through apogee near a succession of relatively small habitats just to the east of Greenwich. For the first habitats constructed in each segment—close to the seeds of Greenwich, Rio, et al.—had naturally tended to be smaller than the ones that came along later, when the construction process had hit its stride. The closer to a boneyard you got, the larger the habitats generally became. As Rhys panned and zoomed around, habitat names came and went on the screen: Hannibal, Brussels, Oyo, Auvergne, Vercingetorix, Steve Lake. The latter aroused a flicker of interest. Kath One had had an old friend living there. But the friendship wouldn’t likely have survived the transition to Kath Two.