Gathering Blue
what signal do they teach Jo for contracting them?
help
![](https://d22o6al7s0pvzr.cloudfront.net/images/bookrags/qa/avatars/.defaults/unknown.png)
Asked by
Lamalove
Last updated by
Cat
help
Thomas instructs Jo to climb her furniture and knock on her ceiling with a hairbrush if she really needs help, since his room is directly above hers. They test the plan, and Jo is able to knock on the ceiling easily.