Allie is Holden's younger brother who died of leukemia a few years before the story unfolds. Holden starts talking about his younger brother's death in chapter five after his roommate asks him to write a descriptive essay about a room or a house. Holden can't do that though because he keeps thinking about Allie's left-handed mitt that has poems written all over it with green ink. And in typical Holden Caulfield style, he goes off on a tangent to describe what he did the night his brother died. What he did was so crazy that his parents even wanted him to be "pychoanalyzed and all"(39). He decided to sleep in the garage the night his brother died, but he had a mental breakdown and punched out all of the windows in the garage. Then he tried to punch out the windows in the family car but by that time his hand was broken and he couldn't do much worse.