Definition of Dramatic Irony
Jerry Cruncher spends so many years doing odd jobs for Tellson’s Bank that he becomes a de facto employee of the respectable institution. However, the scrupulous Mr. Lorry of Tellson’s spends almost the entirety of the novel unaware of Cruncher’s secret moonlight occupation as a “resurrection man,” or in other words, a graverobber.
Darnay’s ignorance of Carton’s plan to sacrifice himself in Darnay’s place is an instance of dramatic irony. In the prison cell, when Carton asks Darnay to switch clothes with him, the unsuspecting Darnay is as compliant as “a young child in his hands.” Though Darnay writes his wife a long parting letter explaining why he kept his noble birth a secret, Carton forces him to write a new letter, the substance of which Darnay does not understand. The letter contains Carton’s last words to Lucie, and it reads:
Unlock with LitCharts A+If you remember […] the words that passed between us, long ago, you will readily comprehend this when you see it. You do remember them, I know. It is not in your nature to forget them.