At the beginning of chapter 9, Huck suggests to Jim that they try and go find a cavern that Huck had found earlier in the day. Jim agrees and they begin to search for it
As they are searching and exploring, they find the big cavern on a mountain side and decide to camp there for the next few days. The cavern was so big that Jim could even stand up inside of it. Later in the night, they decide to eat dinner and go to sleep.
The next day, Huck and Jim decide to head up to the head of the island and saw a frame house down, on the west side. They thought it would be a good place to explore so they walked right in. As soon as they entered, they saw a man on the ground and thought he was alive. They tried to talk to him but they got no answer so they declared him dead. Huck and Jim decide to take all they can get from the house since no one was there to stop them.
The main idea of the chapter is that Huck and Jim are becoming comfortable with their surroundings. They are able to use teamwork and their nature skills to survive. They used these skills to find a place of shelter and useful things to put in their canoe. One literary concept that was used in this chapter was a metaphor. This was used on page 55 which states, "The door of the cavern was big enough to roll a hogshead in..."