Citadel of the Autarch, chapters 1 to 4
Time for the final volume!
Severian has reached the warzone, his planned destination. Starving, he robs a dead soldier for food- and only after he has eaten thinks to use the Claw to resurrect him. The two stagger northward to the front line base. The two are both treated - Severian too is hurt, presumably after the fight after the end of the last book.