In Chains what two characters have work together? Why? What do they do together? How do they help each other?

I suppose that the two characters that have the most synergy with each other are Isabel and Curzon. They are both current/former slaves working to forward the cause of the American Rebels against the Loyalists. At first, it might not appear that the two characters work well together, but their bond deepens as the book continues. Curzon first helps Isabel find her way around town. He shows her where to get water, and he helps her get back to the Lockton household after she becomes lost. Along the way, it is clear to the reader that Curzon is out to protect Isabel. He does this in small ways by giving her his share of the food that he secured, but his help continues to grow. He is the character that enlists Lady Seymour's help to nurse Isabel back to health after her branding. Curzon's efforts do not go unnoticed, and Isabel returns his favors by providing for him while he is in prison and eventually breaking him out of prison. Isabel and Curzon might not work hand in hand to do their work against the Loyalists; however, synergy doesn't require them to be in the same room. Their individual efforts combined to have a greater effect than simply the sum of their individual efforts. Isabel's relationship with the Lockton family allows her to provide Curzon's network with valuable intel that they wouldn't have without Isabel.