how does Isabel become bolder and braver as the novel develops?

Isabel goes through a huge transformation during this story. When we first meet her, she and Ruth are expecting freedom; however, they quickly find themselves as slaves for the Locktons. Isabel is upset, but she isn't willing to do anything about it. This is especially true because Ruth is with her. Isabel believes that as long as she does what she is told and keeps her head down that she and Ruth can afford to wait things out. But as Madam Lockton becomes more and more of a tyrant, Isabel realizes that she needs to take bolder steps to obtain her freedom. At first, Isabel believes that she needs to get help from an outside source to get her freedom. That's why she attempts to gain her freedom by giving information to the Patriots and the British. Neither attempt works, and her situation with Madam Lockton continues to get worse and worse. I would say the turning point for Isabel is when Isabel discovers that Madam Lockton didn't completely get rid of Ruth. Ruth is just at a different property, and Isabel has the chance of getting to her. This is when Isabel decides to take her freedom into her own hands. She makes the bold move of stealing papers that say she is free. Isabel runs away from the Lockton house, breaks Curzon out of prison, and rows them across to New Jersey.