Mrs. Crenshaw thoughtfully left two peepholes for me. She did a fine job; Jem said I looked exactly like a ham with legs. There were several discomforts, though: it was hot, it was a close fit; if my nose itched I couldn’t scratch, and once inside I could not get out of it alone.

– Harper Lee

To Kill a Mockingbird, Chapter 27. Scout goes to the Halloween pageant dressed as a ham. Her costume is a symbol of childhood innocence, while halloween is the holiday where childhood innocence meets evil.