Someone way smarter than me once observed that maps are critical parts of vintage mystery novels and fantasy novels. They’re often the only way to unambiguously set the reader in time and space.
This one of the murder scene maps from The Greene Murder Case (1928) by S.S. Van Dine.
The later Ellery Queen books employed this device, of course. And many times, knowing exactly where one suspect was in relation to other suspects or in relation to various objects were critical to the resolution. (Fans, I’m thinking of The Dutch Shoe Mystery and The American Gun Mystery.)
Check out the dialogue on this page, by the way. Vance routinely dropped the g’s from the end of his words. I’m told it was a sign of the upper crust at the time.
Irritatin’, wouldn’t you say?