In this chapter, we learn that the Brobdingnagian school is very scared of the monsters, because they've experienced first-hand the terror they cause. They have 30 of them, and if each of them kills three, they can kill off the remaining 30. This is a good idea, because the monsters will flee if they find a way out of the area, which will be a bad thing for humanity. The schoolboy asks if he can draw a diagram of the extermination formation. He can't draw it because he doesn't have a key, but he can use the key to create the formation. The key is a piece of paper with a key on it, and the key functions as a key for both the extermination and the bloodthirsty formation. This means that both the bloodthirsty and the extermination forms can work at once. The boy asks if there's anything else he hasn't told him. He tried to withdraw money from his credit card, but it was swallowed by the monster at the bank, so he needs to get it back.