Great Expectations Chapter 50: I Learn More of Provis' History...
Pip returns to London, where Herbert takes good care of him, dressing his wounds and steering conversation away from all of the disturbing topics toward which it might move. Herbert also says that Provis "improves," that he's seeming more civilized every day. He then passes on the details of a story Provis told him, details which at last complete the picture for Pip. Provis was once involved with a woman who was brought up on the charge of murder. They had a child together, and the woman destroyed this child. Of course Pip recognizes this as Molly's story, and realizes that Estella is Magwitch's daughter.