Why are Doctor Manette's "reiterated instructions" to Charles in preparation for the trial so important?Book the Third, Chapter 6
In Chapter 6 of Book the Third of A Tale of Two Cities by Charles Dickens, Charles Darnay, who has returned to France to testify on behalf of M. Gabelle, the tax collector of his uncle's estate, finds himself on trial. He has been instructed by Dr. Manette on how to respond to the questions posed to him by the Revolutionary Tribunal so that he will be released. For example, when asked if he were an emigrant, Darnay replies that he is not since he voluntarily relinquished a title that was "distasteful to him" and that he lives by his "own industry" in England. He states that he has witnesses to this statement. Then, when asked if he had married in England, Darnay proves that he loves France as he has married a French citizen, Lucie Manette.
On these few steps of his dangerous way, Charles Darnay had set his foot according to Doctor Manette's reiterated instructions. The same cautious counsel directed every step that lay before him, and had prepared every inch of his road.
Darnay explains that he has not returned to France sooner because he had no means of living in France after relinquishing his title; he returned to save a citizen's life, and to bear witness to the truth about him. Again, he invokes the testimony of a witness. This time it is Dr. Manette, and the crowd cheers. Mainly because of the crowd's endearment to Dr. Manette, the prisoner Darnay is released.