What did the flyer say that lefty Lewis asked bud to hide wen cop drove?

In the book "Bud, Not Buddy" by Christopher Paul Curtis, Lefty Lewis asked Bud to hide a flyer that advertised a "Special Event" featuring a jazz band. The flyer was important because it could reveal Bud’s whereabouts and connections, which Lefty wanted to keep discreet from the police. The context highlights the precarious situation Bud was in, and the importance of trust and secrecy in his journey.