That night, Tom sneaks out of bed and goes to the graveyard with Toms friend named Huck. After a while, three ghostly like figures approach the grave, but they turn out to be three adults from the town carrying out a midnight mission of their own. Tom and Huck are surprised to discover the young Dr. Robinson accompanied by two local outcasts, the drunken Muff Potter and Injun Joe. Dr. Robinson orders the other two men to dig up Hoss Williams’s corpse, supposedly for use in medical experiments. After the two finish the job, Potter requests extra payment, and Robinson denies him. A fight starts; Dr. Robinson hits Injun Joe down and then is attacked by Potter. He uses Hoss Williams’s headstone to defend himself, knocking Potter unconscious. In the fight, Injun Joe stabs Dr. Robinson with Potter’s knife.
Tom witnesses all these events and is faced with the question "Should I tell someone about what just happened.". He makes a oath with Huck that they wouldn't tell anybody about what they witnesses that night. The make the oath because they think if they tell someone InJun Joe will come after them next. Tom has to be very mature about this situation in order to make a choice in what to do. This really showed that Tom is growing as a person. Mark Twain keeps you on the edge of your seat through these two chapters. He decided to add another plot twist in these chapters. Sid, toms brother found out that Tom came home late and, he told his aunt. This leaves the reader wanting to read more and find out what's next. This scene painted a picture in my head and the plot twits wanted to read more!