At some point the Committee—which was what they called their ruling council—must have become aware that vast numbers of humans were living in space and actively prosecuting the TerReForm. They could simply have walked out onto the surface and sent out some kind of an SOS at that point. Instead they had made a positive decision to conceal themselves, to hide their spoil dumps, to shun communication with the Spacers. The central question, then, was why they had made such a choice. Sonar Taxlaw wasn’t much help in explaining it. When Ty or the others asked questions, she offered nonresponsive answers that told of a subterranean culture in which such things were never spoken of.