to meet him.
Barsad helps Sydney Carton with his plan at the end of "A Tale of Two Cities" because he is manipulated and blackmailed by Carton. Barsad is coerced into aiding Carton due to the threat of being exposed for his own dubious activities. Ultimately, Barsad helps Carton as a way to save his own skin and avoid consequences.
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.
Barsad is concerned only for his own skin. He wants nothing to rebound to him by this mad act of Carton's and, having arranged for Carton's entrance into Darnay's cell, he considers their account settled.
Carton recognized the spy as Ms. Pross' brother, which would make him English (and by the French standards in the book at that time, a traitor). Knowing that Darnay was in prison at that time, he made a bargain that the spy would take Carton in to visit Darnay before Darnay could be executed, in return, Carton would not reveal the identity of the spy (which would result in the spy's death if his identity were discovered).Carton promised he would not reveal the spy's identity to the revolutionary government
John Barsad was the Spy who helped Sydney Carton change places with Charles Darnay.
They went to the Tellson Bank to procure information or to transact business related to their legal profession as well as personal finances. John Barsad visited the bank for legal matters, Sydney Carton for financial transactions, and Jerry Cruncher for his job as a messenger and porter.
John Barsad is the person who helped Darnay escape. Not Sydney Carton
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.
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.
Solomon Pross was also known as Sydney Carton in Charles Dickens' novel "A Tale of Two Cities".
Sydney Carton confirmed the true identity of Miss Pross's long-lost brother, Solomon Pross, who turned out to be the notorious criminal John Barsad.