 Scaler plans to travel with Amherst to the village of Aquia, then remain there for two months while Amherst continues on his rounds.Amherst finds Scaler strangely knowledgeable about conditions on Ganymede for someone who claims never to have left Earth before.Reaching Aquia, Amherst and Scaler find that its chief trader, Carl Kent, has gone missing; his teenage daughter Carol is carrying on in his place.