Claw of the Conciliator: Chapters 13 to 15
Severian uses the Claw to bring back the soldier he killed. He encounters Hethor again. Severian and Jonas are captured and taken somewhere prisoners are held indefinitely in a big room; there are even generations of prisoners who are born and die there.
They also catch a glimpse of Dorcas, Baldanders, Dr. Talos, and Jolenta.