what does calpurnia say to miss rachels cook about toms despair? what was the last thing tom told atticus?

"She said there wasn't a thing Atticus could do to make being shut up easier for him, that the last thing he said to Atticus before they took him down to the prison camp was, "Good-bye, Mr. Finch, there ain't nothin' you can do now, so there ain't no use tryin'." Calpurnia said Atticus told her that the day they took Tom to prison he just gave up hope. She said Atticus tried to explain things to him, and that he must do his best not to lose hope because Atticus was doing his best to get him free. Miss Rachel's cook asked Calpurnia why didn't Atticus just say yes, you'll go free, and leave it at thatseemed like that'd be a big comfort to Tom. Calpurnia said, "Because you ain't familiar with the law. First thing you learn when you're in a lawin' family is that there ain't any definite answers to anything. Mr. Finch couldn't say somethin's so when he doesn't know for sure it's so."