john barsad
"...And I'm gonna be high as a kite by then..."
Miss Pross' brother. Later in the book you find out it is actually John Barsad.
The vendor in "A Tale of Two Cities" is named John Barsad. He is a spy who plays a key role in the plot of the novel by Charles Dickens. Barsad's character is closely tied to the French Revolution and the themes of betrayal and loyalty.
John Barsad is the person who helped Darnay escape. Not Sydney Carton
Carton
John Barsad told Carton that Roger Cly had been murdered and buried under the alias of Barsad's brother Solomon Pross. Cly had agreed to fake his death in order to frame Darnay for treason and secure his own safety and wealth.
The Defarges learn from John Barsad that Charles Darnay is in a relationship with Lucie Manette and is planning to marry her. Barsad also mentions that Darnay is a French aristocrat who has denounced his family's wealth and privileges.
Madame Defarge determined that John Barsad was from England based on his accent and appearance, which were different from typical French characteristics. Additionally, she may have picked up subtle cues in his demeanor and behavior that hinted at his English origins.
Sydney Carton helped Charles Darnay escape from prison in Charles Dickens' novel "A Tale of Two Cities." Carton switched places with Darnay and sacrificed himself so that Darnay could leave the prison safely.
John Barsad reported the fate of Charles Darnay to Defarge. Barsad informed Defarge that Darnay had been sentenced to death by the revolutionary tribunal.
Sydney Carton is the character who makes the proposal to switch places with Charles Darnay in the courtroom in "A Tale of Two Cities". By doing so, he sacrifices himself for Darnay's safety.