More Questions

As I had stated last week, due to the high diction and many characters there are moments when the novel Great Expectations becomes hard to follow. After reading this week around Chapters 42 and 43, the character "Pip's Convict", newly introduced as Able Magwitch shares his past and life story with Pip. Throughout this time, the character of Compeyson was spoken about. What I don't really understand is why Magwitch wants to see Copmpeyson again because he had turned against him. I think its maybe because he wants to get some sort of revenge, but personally I don't know if that makes sense either because he isn't technically supposed to be over with Pip. It would be great if someone could explain this.