When Tarzan is over 10 years old, he becomes curious about the cabin by the beach that the apes occasionally wander past. He has heard some of the stories about the cabin from the other apes, but their language is too limited to tell him much. One day, he figures out how to unlock the door and enters. He finds two human skeletons and a cradle with a third small skeleton. The sight does not frighten him because he is used to seeing death in the jungle. He explores the cabin and becomes fascinated by a children’s alphabet book. He looks at the pictures and sees that they depict many jungle animals with which he is familiar, such as a lion and a snake. He also finds a hunting knife and takes it with him. When he leaves the cabin, he is attacked by Bolgani the gorilla. Tarzan is hopelessly outmatched by the gorilla’s strength, but he manages to stab the animal with the hunting knife, killing it. However, Tarzan is seriously injured and passes out. Kala is worried and sets out to look for her son while Kerchak and Tublat refuse to help.