The Smartest Engine is a short magazine story.
Emily and James are both very proud of their smart paintwork and shiny domes. They decide to have a contest to see who is the smartest looking engine. James puffs passed the works, and sees the workmen using a big saw. Nosey James wants to know what they are doing and goes for a closer look but gets covered in dust.
- In one illustration, James' cab roof is white instead of black.
- The plot mentions that Emily has a dome when she does not; she has a steam valve.