How does Chapter 27 increase the tension concerning Mr. Ewell's threats against Atticus in To Kill a Mockingbird?
The reader learns that Bob Ewell is still not satisfied with the guilty verdict against Tom or his death. When Bob "acquired and lost a job in a matter of days," he blames his firing on Atticus. It is no doubt Bob who Judge Taylor nearly catches trying to break into his house: The judge and Atticus are the "about two more to go" to whom Bob refers concerning his own personal revenge. Bob feels the urge to stalk and berate Tom's widow, Helen, "crooning foul words" at her when she passes his home. Atticus tries to downplay the situation to ease the worries of his family, but when Aunt Alexandra has a premonition on Halloween night--
"... somebody just walked over my grave..."
it becomes obvious that something else is going to happen besides Scout appearing as a ham in the pageant.