This looks a lot like the maps that came with the old Sherlock Holmes Infocom game: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Sherlock:_The_Riddle_of_the_Crown_Jewels" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Sherlock:_The_Riddle_of_the_Cr...</a> ... which makes sense I guess.