This is their Last Day of School and it is Assignment Day
Later in the story Granny is looking for something but she doesn't know what, when Lina came home she found poppy (her little sister) eating a piece of paper.
Once Lina was able to get the piece of paper from poppy she tried reading it but it didn't make sense. So, Lina asked Lizzie to come over but Lizzie seemed to not care about it at all.
Once Lina and Doon read the note, they go to the pipeworks and stop to see the door but they hear someone and it's familiar to Lina.
"Hey Doon" said Lina.
" Ready to go to the Pipeworks" said Doon.
When Lina and Doon are out to go to the singing they find posters on signs that say "Wanted Lina Mayfleet and Doon Harrow, Reward." After They saw the poster they ran to the school and hid there for a couple of hours.
They are on the river and the tides have got softer. Then they come to an end and have to get rid of the boat.