Ackley Timeline and Summary

While Holden is reading Out of Africa, Ackley comes to his room, pretending his arrival is an accident. He comes in just to shoot the breeze and trash talk Stradlater.
Ackley cuts his toenails all over Holden's floor.
He doesn't seem to get any of Holden's hints that he just wants to read in peace.
After Stradlater leaves on his date with Jane, Ackley goes to the movies with Holden.
Ackley is in his room when Holden enters with a bloody nose from his fight with Stradlater. Not exactly Host of the Year, Ackley doesn't want to let Holden sleep in his roommate's bed.
When Holden asks him if you need to be a Catholic to join a monastery, Ackley gets offended, thinking Holden is making fun of his religion.
After Holden leaves, the last we see of Ackley is him forecasting that Holden is going to get his head bashed in someday for being such a wise guy.