In To Kill a Mockingbird who was covering Atticus the whole time during the mob scene at the jail?

In "To Kill a Mockingbird," Scout unknowingly diffuses the tension during the mob scene at the jail by recognizing Mr. Cunningham and engaging him in conversation about his son, Walter. This interaction with Scout reminds Mr. Cunningham of his humanity and the respect he has for Atticus. This ultimately leads him to disperse the mob and prevent any harm to Atticus.