Allie was two years younger than his brother Holden and about three years older than her sister Phoebe. Holden describes him to be smart for his age that teachers were always writing letters to their mother telling her what a pleasure it was having a boy like Allie in their class. Allie was interested in sports and poetry that he wrote poems all over his left-handed fielder's mitt so he would have something to read when he was in the field. This baseball mitt would later become one of Holden's most treasured possessions that he would bring it along with him at Pencey Preparatory School.
At age 11, Allie died of leukemia. This seemed to have a long-lasting and profound effect on Holden that on the night Allie died, he slept in the garage and broke all the windows with his fist "just for the hell of it."
The Catcher in the Rye Edit
According to Holden, Allie had very red hair which was bright enough to be seen from across a golf course. He was also left-handed.
Holden notably holds Allie in high regard, describing him to be "terrifically intelligent" and referring to him as a "wizard". With regards to Allie's personality, Holden says that he was "the nicest, in lots of ways" and that he never got mad at anybody.