Contains a classic confrontation when Lucas drops his loaded (but uncocked) rifle in front of the schoolhouse, and the teacher orders him "never to bring a dangerous weapon near this schoolhouse again" because he's not responsible with it. The teacher escalates the battle by declaring that the reason Mark isn't getting his homework done is that his father likes conversation too much, and orders Mark to stay indefinitely after school so he can supervise his homework. Mark can't take the insult to his father and runs out of the classroom. He hides in an old mineshaft (was there any part of the West without an abandoned mine in walking distance?), and Lucas and the teacher are forced to combine forces to save him when he's caught in a collapse. In the process, the value of studying the Greeks is affirmed. Won't spoil it by telling you how.