I think the Nonmen are the most fascinating part of Earwa, their history should be a major plot point of the TUC. T don't think their civilization was in decline at the time of the Fall, their were nine high mansions at that time. With Cujara Cinmoi and Siol being the single strongest polity. But the Nonmen kingdoms seem to be much bigger than their human descendants, with nine mansions controlling the whole of Earwa. Siol seems to have been in the same area as Kuniuri, because Viri wich was just norh in Agongorea and Cil-Aujus in the three seas just south. If they only build their cities in mountains that would put Siol in the Demua mountains, maybe the Nonmen ruins Kellhuss fights Cet'Ingira could be the entrance. But more likely is that Siol is like Doriath in that the capital city is centrally located near a great river, putting Siol along the Anduin. probably near Sauglish or the other great cities of the Kuniuri. They may have built their first cities near the ruins of Siol. Though the high mansion controls the whole territory and gives it name to the kingdom, but there must be smaller mansions throughout the territory like the one in which Moenghus built his abode. I really hope Bakker does a Silmarillion type series for the Cuno-Inchie wars after the second apoc is completed. On the Ishroi or Quya point, I think these two classes maybe somewhat interchangeable, with Cleric and Cet' Ingira being both, I think a good bet is that all the royal lines had a mixture of both with the rulers being both. The line by Cleric where he says to the CC statue that his voice has cracked mountains implied to me that he was a sorcerer. Maybe kings choose to fight each other in single armed combat, or the in the heat of the moment Nin' Janjin surprised Cujara Cinmoi before he could react. I fervently hope that Nin is still alive somewhere in Golgotterath, such a character needs to make an appearance in TUC and have his story told, the first Nonman traitor who helped doom his own people for vengeance, but his lack of mention since the Cuno-Inchoroi wars is making me doubtful of his fate.