The interaction between Bigger and Mary during the outing is laced with irony. Mary is trying her best to be friendly with Bigger to make him come out of his shell from the inhibitions imposed over decades or centuries, by being nice and free with him. Bigger, on the other hand, not only withdraws from her, nut nurses hatred towards her. To a very great extent, the same thing plays out in Bigger's interaction with Jan. Mrs Dalton perceptiveness and sensitivity at the times when things have gone wrong cast a huge ironical shadow on those that have eyes. She is quick to sense that things have gone wrong in spite of Peggy's encouragement to the contrary. It is her conviction that there is something wrong about Mary's disappearance which first puts' fear in Bigger over the possibility of beings exposed. It is through Mrs. Dalton that we get to know that, in spite of Mary's wild character, there had never been a time she left home without leaving a note behind to show where she was going. It is this strong conviction that triggers for investigation.
Irony also shows up in the interrogation scene where Mr. Dalton apologizes to Bigger for being rough handled by Mr. Britten, a private investigator. It is ironical be-cause Bigger, has caused an irreparable harm to Mr. Dalton by killing the latter's daughter. it is ironical that Mr. Britten shows more anger than Mr. Dalton, who remains calm throughout the moments of interrogation. Another instance of irony plays out at the press conference where Mr Dalton speaks of his intention to meet the total ransom demand of the kidnappers. Unknown to him the Kidnapper/murderer of his daughter is right there under his nose. Also his shielding Bigger from interrogation by pressmen further advances the irony of the situation.
It is ironical that the crime for which Bigger is being hunted and sentenced to death is accidental in contrast to the murder of Bessie which is premeditated. Irony can also be seen in the rat episode, and Bigger's show of 'faked' bravery in his attack on Gus for their aborted plot to rob a white man.
Points to note:
1. A good understanding of irony: (title, situational).
2. The interaction between Bigger and Mary.
3. Mrs. Dalton's perception in her blindness
4. Mr. Dalton's blindness to reality: (exploitation)
5. Mr. Britten's show of more anger than Mr Dalton.
6. Bigger's show of laked"bravery in the face of fear.