chunk: Now in prison, Ned tries to convince Grace that Matty is still alive, laying out for him the scenario that the woman he knew as "Matty" assumed the identity of Matty Tyler in order to marry Edmund and get his money. The woman Ned knew as "Mary Ann Simpson" discovered this and played along but was then murdered and her body left in the boathouse. Had Ned been killed by entering the boathouse, the police would have found both suspects dead, and "Matty" would have gotten away with the money.