Answer:
(1) The letter is from Gabelle. He was arrested, brought to Paris, and charged with treason for helping an emigrant, Charles Evrémonde. Gabelle writesthat the peasants neither know nor care that he in fact was trying to help them, working on Charles's orders. He begs Charles to come save his life. (2) Lorry receives an urgent letter,addressed to the Marquis St. Evrémonde, along with instructions for its delivery. Darnay reads the letter, which contains a plea from Gabelle, whom the revolutionaries have imprisoned for his upkeep of the Marquis' property. Gabelle begs the new Marquis to return to France and save him.