Huck initially feels the frame house that floated down the Mississippi to the island he and Jim were inhabiting was a piece of good luck because of all the useful supplies they were able to collect from it. Huck manages to avoid looking at the dead man while they ransacked the bedroom, and Jim refuses to speculate about him when Huck wants to discuss his curiosity about him the next day. Huck insists that the house was good luck in spite of the dead man.
Huck changes his thinking when the mate of the rattlesnake he killed and left to trick Jim bites Jim. Watching Jim go through the effects of the rattlesnake poison thoroughly convinces Huck that the house was bad luck, although Jim says there may be more to come. And, of course, eventually Jim informs Huck that the dead man in the house was Huck's Pap, which was sad news but possibly good luck in the long run for Huck.