The next morning, after a night of troubled sleep, Tom considers the possibility that events of the previous day were a dream. He finds Huck, and Huck rids him of this idea. The two boys speculate about where hiding place “Number Two” might be, deciding that “Two” probably refers to a room number in one of the town’s two taverns. Tom visits the first tavern and learns that a lawyer occupies room number two. In the second tavern, room number two remains locked all the time. The tavern-keeper’s son claims that no one ever enters or leaves the room except at night. He claims to have noticed a light on in the room the previous night. The boys decide to find all the keys they can and try them in the room’s back door. Meanwhile, if Injun Joe appears, the boys plan to tail him to see where he goes, in case they are wrong about the room.
On Thursday, the boys make their way to the tavern. Tom slips inside, and Huck waits for him. Suddenly Tom rushes by, shouting for them to run. Neither stops until he reaches the other end of the village, where Tom recounts that he found the door unlocked and Injun Joe asleep on the floor, surrounded by whiskey bottles. The tavern is a “Temperance Tavern,” meaning that it purportedly serves no alcohol. The boys realize that the room must be off-limits because it is where the tavern secretly serves whiskey. The boys decide that Huck will watch the room every night. If Injun Joe leaves, Huck will get Tom, who will sneak in and take the treasure.
The next day, the Thatchers return from Constantinople. When Tom sees Becky, he learns that her picnic is planned for the following day, so the Injun Joe predicament drops to secondary importance. The children plan to go downriver to a famous cavern, and Becky’s mother tells Becky to spend the night with one of her friends who lives near the ferry. Tom then persuades Becky to disobey her mother and go with him to the Widow Douglas’s house instead, where the kind woman will probably give them ice cream and let them spend the night.
As they take the ferry down the river, Tom worries briefly that Injun Joe may go out that night, and he may miss the action. But the promise of fun with Becky soon drives such worries from his mind. The children arrive at a “woody hollow,” play in the forest, and eat lunch. Afterward, they climb up to McDougal’s cave and spend the afternoon excitedly exploring the passages. They stagger out that evening happily covered in clay and board the ferry for home.
Huck sees the ferry arrive in town, and a short time later he sees two men pass him carrying a box. Assuming them to be Injun Joe and his companion, he decides that there is no time to fetch Tom—the two men are escaping with the gold. He follows them to the Widow Douglas’s house, where Injun Joe describes to his friend how he plans to slit the widow’s nostrils and notch her ears like a sow as revenge for an incident in which her husband, then justice of the peace, had him horsewhipped for vagrancy.
While the two villains wait for the widow’s light to go out, Huck races down the hill to the house of an old Welshman and his sons. They let him in, and when he tells them what is about to happen, they seize their guns and rush toward the widow’s house. Huck follows them for a time, hears a burst of gunfire, and then flees for his life.