RotLB
This is the final version of the map. I've added doorways and stairs. The doors are marked with squares and rectangles. The rectangles are double doors, large bronze ornamental ones depicting mythical scenes. The concentric squares make places that there are doors on both the main floor of the Library and on the gallery above it.
The stairs in the Library run between the main floor and the gallery. They're more like ladders with handrails: very steep wooden stairs, like one would find aboard ship, though with bronze handrails and stringers (the vertical frames that connect the treads and make up the sides of the staircase).
Please, please don't ask for exact dimensions of the buildings. They probaby won't add up. Nick and Sandy can determine the distances to within tiny margins if they work together, but the layout is already handwavy. It's ok to ask for distances between features of story importance, though, like the distance between a flight of stairs and the nearest door.