Pip's left arm was burnt to a crisp, and his right arm is a little toasty as well.
Herbert visits and helps him dress his wounds and change his bandages.
While Pip was away, Herbert says that Magwitch told a story. This is Magwitch's story:
Back in the day he had been married to a crazy lady who, upon becoming jealous of another woman, killed the woman and who threatened to kill her own little girl (who Magwitch loved).
Afraid of being sent to jail or worse for being the cause of a child's death, Magwitch never went to the authorities or pursued his wife. Compeyson knew this story and used it to blackmail Magwitch into submission.
This ends Magwitch's story.
Pip nearly spits jellybeans. It looks like Miss High-and-Mighty doesn't have a lot to gloat about now.