Carlstead leads the way to the outer gate to the wall. He tells Maria that they will test their mettle by climbing the ladders up to the top. They will learn how to use the new vertical maneuvering equipment, which will help them fight off the four who climb the ladders. Maria is impressed by the new device, which seems smaller and easier to use. She also notices that there are more people around the wall than usual. She tells them to stop and look at the landscape, which she describes as "wobble" . The biggest one is ten meters in the back