When Lalo and Chuy give Miguel going away gifts they make a deal that they will meet agin in San Jacinto in 10 years.
chapter 12 pg. 40
This is the part when Miguel's abuelita gives him her medallion of la Virgen de Guadalupe so she can protect him along the way to cross la linea.
chapter 14 pg. 47
Miguel and Elena running away
This part is very important to the story because if Miguel hadn't met Javier then they wouldn't have made it across la linea by themselves later in the story.
chapter 18 pg.63
This is the scene where Capitan Morales pulled of the indigena's shawl off and it turned out to be Elena. When Miguel gasps Capitan Morales gets curious of who they are then someone calls Capitan Morales a coward and that make him angry an makes him capture everyone.
This scene is when Javier distracts Capitan Morles by pretending to be choking so everyone else can escape. Miguel and Elena Quickly get away and head out to town so they can blend in with others so they won't capture them.
In this scene Miguel and Elena check out the mata gente to see if they will actually get on it, when they get there they reunite with Javier. Then they go together to wait for the mata gente.