Rufinus cannot sleep. His bed feels like a grave. He is about to go out and be killed by Dahut.
"'You've bought us some years...'"
-Poul and Karen Anderson, The Dog And The Wolf, Chapter XVII, section 7, p. 351.
The Time Patrol and Dominic Flandry also buy years that people can live in.
On his way out of the city:
"Rufinus dodged around horse dung and offal heaps. Though Gratillonius fumed about it, there was likely no hope of enforcing such cleanliness as had been on the streets of Ys." (p. 352)
No, indeed. Ys is gone and Rome withdraws. The Dark Ages, to be followed by the Middle Ages, approach.