...I wasn't going quite that far; simply that I doubt Mordswell was any sort of historical figure but more along the lines of... additional details for the sake of this game.

The smoking room was barred until very recently, but we have glanced around before while voting.

What places do you have in mind? There doesn't seem to be much of a trail - they came into the Drawing Room, shot the Hostess in the middle of the night, and returned to their rooms.