But they were coming to a stop, and Sarah only felt more agitated. Up ahead, one of the other strange aspects of the city was before them. Irkalla had maintenance systems all right—changelings. The drones had tunnels that were painted all in red, with lines on the floor warning passers-by where not to go. They moved freely through the city, and people seemed to pay them less attention than they did to the location of the curbs and sidewalks.