Road maps of downtown London
I found a great site today with road maps of London from 1926 that I had to post (click on it to see the large version and take a look at Regents Park — cause that’s right next to Baker street):

SOURCE: Daily Mail 1926 Road Map of London and Ten Miles round showing the New Arterial Roads and Main Roads out of London. Published by Associated Newspapers, Ltd., Carmelite House, London, E.C.4