The Catcher in the rye theme of morality

There are two major events in Holden's past related to death: his brother Allie dying from leukemia, and James Castle's suicide at Elkton Hills. How has each of these affected Holden and his thoughts about mortality?

Where does Holden envision his brother Allie to be now? Does he seem to believe in an afterlife? Why is Holden so bothered by Allie's burial in a cemetery?

Holden thinks about death a lot, but does he ever think about his own death? Is that secretly what he’s worried about?