How Does Percy Work?

How Does Percy Work? is a magazine story.

Plot
Bertie is curious to know how Percy works as he is a steam engine. Percy does not know himself, so he asks his friends when he meets them along his journey. Afterwards, Percy tells Bertie how steam engines work.

Characters

 * Percy
 * Bertie
 * Thomas
 * Henry
 * James
 * Edward
 * Gordon

Goofs

 * The fourth illustration shows Gordon painted green to represent Henry.