1. Name three brothers (of heroines) who had been involved in a duel.

The common law definition of breaking and entering involves entering at night with felonious intent, but I am willing to waive both those requirements. I do, however, require that the break-in involve someone entering a house stealthily, and in an unconventional manner. Forcing one's way in past the servants does not count. Nor does breaking into an office or a hotel. I mean someone's residence. Each novel counts only as one answer, even if there's more than one break-in.