He continued, slowly, by a process of osmosis and white knowledge (which is like white noise, only more useful), to comprehend the city, a process that accelerated when he realized that the actual City of London itself was no bigger than a square mile, stretching from Aldgate in the east to Fleet Street and the law courts of the Old Bailey in the west, a tiny municipality, now home to London’s financial institutions, and that that was where it had all begun.