2 - I'm a little confused on using the map. With the directory, you can find and speak to whoever you need to. How does the map help, other than tell you how long it takes to get somewhere?
Occasionally the physical position of locations on the map will be part of the case.
"But guys, it would be impossible to get from the north side of London to the southern end in the time he had!"
"Wait, how did she see that place from her room?"