In The Adventures of Huckleberry Finn, how is the loot from the House of Death helpful later on in the novel?
By referring to "The House of Death" I assume you mean that house that Jim and Huck come across floating in the river in Chapter 9 with the dead body in it, which we later discover is the body of Pap, Huck's father. Huck and Finn find a number of objects in the house which they take for later use, even some objects that at first glance seem rather strange. However, in concluding this section, Huck writes:
As so, take it all around, we made a good haul.
They had taken a number of practical objects, such as a tin lantern, a knife, candles, medicine and many other objects. Also, interestingly, they took some women's clothes, which Huck takes as well, saying "it might come good." Of course, it is in the very next chapter that they do "come good" as Huck uses them to disguise himself as a girl to go and find out what is happening on the mainland. Thus the loot they gain from this house is very useful to them both in furnishing them with more supplies and giving Huck what he needs to disguise himself.