While Lina was buying color pencils from Looper's shop Poppy had left the shop and a blackout happend. Lina didn't realize that Poppy had left the shop and Poppy had gotten lost during the longest blackout.
"Yeah! We're going to take you to the mayor!"
"Hey! Leave Me Alone!"
While Granny was looking for something Granny gave Poppy a box that had a peice of paper. It turns out Poppy was chewing on a peice paper. The peice of paper was the instructions.
A World Of light
Once Lina saw Lizzie come out of the supply depot with a bag she wanted to know what was in the bag. Lizzie tripped and fell on the ground and Lina saw what was in the bag.
The Last Message
"I didn't know that we lived undergoround our whole lives."
"I never knew that the City of Ember was located underground either."
When the gaurds caught Lina and had to take her to the Mayor.
"Ma'am you're going to have to come with us!"
While Lina, Doon and Poppy were walking down the path they saw a notice that was a framed sign bolted to a stone. The sign was talking about how they are going to have to be prepared for a long journey.
As soon as Doon and Lina had reached land they realized that there was a tunnel that was underground. Once they reached the end of the tunnel they realized that the City of Ember was underground.