Two quick asides before launching into the creation process:
First, many of the manor's rooms serve specific purposes in the accompanying adventure. Unfortunately, because I've neither found a publisher nor given up hope of finding one, I can't explain here why each room's elements were crucial to me, or how they interrelate to the adventures overarching mystery. All I can do is tell you what each room's visually significant elements are. Sorry about that.
Second, I love the mansion map in the most recent edition of Clue (and earlier version too, for which nostalgia kicks in powerfully), and, of more recent discovery, the map in the board game Kill Dr. Lucky. I decided to create an image with similar visual power. Moreover, I decided I'd create each room of my map with its own one-point perspective, just like each room has in the Clue and Kill Dr. Lucky boards.
This doesn't mean my aspirations ended at duplicating or imitating either or both of these board games' images. I sought to create my own compelling horror map image. But I embraced these earlier visions as inspiration.
(Please Note! The image I'm attaching here of the Clue board game's map is one I downloaded from the internet. It contains someone else's nationalistic/ethnic slurs that I find repugnant. It's the best visual image I've got of the board, but I don't ascribe to the image's inserted labels. I'll take a better picture of the board when I get home next week and replace the image here.)