What is Cecil Jacobs costume for the pageant in to kill a mockingbird?

Before the pageant, Cecil Jacobs scares Scout and Jem while they are walking. That helps set up the incident that occurs after the pageant because when Bob Ewel is following the kids, Scout thinks that it is only Cecil Jacobs trying to scare them again. If Cecil Jacobs hadn't scared the at the beginning of the pageant than Scout would of been more frightened and might have been more careful with the noise she was making so that the person following the kids wouldn't of been able to follow as easily.