In A Tale of Two Cities, name two ways in which Barsad tries to trick the Defarges.
In A Tale of Two Cities, the Defarges' wine shop is the underground hub of the French Revolution. Here members of the brotherhood call one another "Jacques" to ensure they are, indeed, part of the revolutionary movement. Barsad is a terrible spy, for when he comes to the wine shop he boldly calls Defarge "Jacques"--more than once, even after he's been told he must be mistaken. It's a clumsy attempt to claim some kind of insider status which Defarge, as de facto leader of the movement, certainly knows is not true.
Another attempt Barsad makes is making a reference to the Defarges' dead friend Gaspard, implying that he's somehow "in the know" on revolution details. This one gets no response, either.
He goes on to try to get a reaction of some kind from these stoic shopkeepers, and he tells them of the upcoming marriage between Charles Darnay and Lucie Manette. This doesn't help him get into their good graces, but it does get him a bit of a reaction from the Defarges before he leaves. What does he get for his pains? His name, beautifully knitted into Madame Defarge's scarf.