Who killed Gilbert Worth?

The official verdict was suicide, but those that knew him best thought he was not the type to take his own life. Furthermore, before his death, a missing gun, a half-written letter and two "accidents" had convinced Worth that someone was trying to kill him.

Worth's family and mistress all had motives and opportunity, and those close to him have their own ideas as to how he was murdered. And one occupant of the house in particular has a good reason for wanting to identify the killer . . .