Which chapter in the tale of two cities were they looking for dr manettes letter?

The search for Dr. Manette's letter occurs in Chapter 10, "The Wine-Shop" of *A Tale of Two Cities*.

Here's why:

* The letter is crucial: The letter is a key piece of evidence that reveals the connection between Dr. Manette and the Marquis, who unjustly imprisoned him for 18 years.

* The search: The Defarges, particularly Madame Defarge, are determined to find this letter. They know its importance in their mission of revenge.

* The setting: The search takes place in the wine-shop, which serves as a hub for revolutionary activity and where Madame Defarge is a key figure.

Let me know if you'd like more information on any aspect of this chapter!