human
Write a detailed description of a foreboding scene outside a town keep with a palisade, arch, and town wall.
assistant
Within the wooden palisade, work has begun on a stone curtain wall. About six spans in width, it abuts the existing town wall, reinforcing the logs and providing a more secure defense for the residents. Beginning at the stone arch around the portcullis, the new wall extends to the north and south about half the length of the existing lumber one.