Jim and Hucks finding a dead body.

When Jim had found out that Huck wasn't really dead. Jim and Huck explore the island together and discover a cavern atop a hill in the middle of the island. They paddle their canoe to the base of the hill and then haul their equipment into the cave in order to keep it dry. While they were in the canon the storm Jim predicted arrives that night, and the river rises for more than twelve days straight.
Huck and Jim go out on the river at night to pick up drifting logs and other objects that happen to float downstream. One night, they capture a large raft which they will later use to navigate the river after they leave the island. Later on, they see a whole house floating downstream then Jim sees Hunk's Pap floating in the water and he didn't want to Hunk to see him but to make him feel bad. While all this was happening I think Jim was being a good friend to Huck trying to protect him from getting hurt and to continue on with his life that he doesn't have to worry from getting hurt by Pap.