Sydney Carton was the jackal.
In Chapter 5 of A Tale of Two Cities, the jackal is Jerry Cruncher, who works as a resurrection man by night (digging up corpses) and a porter for Tellson's Bank by day. Cruncher's double life as a graverobber and a bank employee highlights the stark social and moral contrasts portrayed in the novel.
In Tale of Two Cities, Carton was nicknamed the Jackal because he always did all the work on cases while Stryver just review and presented the cases in court. This interaction can be found in chapter 5 entitled, "The Jackal"
Paris and London.
Sydney Carton is killed in Book 3, Chapter 15 of "A Tale of Two Cities".
grim and sombre
It is dark and uncertain.
Generally it is talking about the conditions of the cities which are disbalanced
It's in chapter 21 of Book the Second. It should be called Echoing Footsteps.
They were looking for Dr. Manette's letter in Chapter 6 of "A Tale of Two Cities." In this chapter, Lucie Manette discovers the hidden letter while cleaning the doctor's old shoemaking bench.
Gabelle is mentioned in Chapter 8 of "A Tale of Two Cities." He is the tax collector of the village of Beauvais, and he plays a significant role in the story as he is accused of embezzlement by the revolutionaries.
Evremonde
This quote comes from Chapter 3 of A Tale of Two Cities. It is spoken by Sydney Carton as he reflects on his life and the missed opportunities to improve himself.