It enables him to know exactly what goodies there are for him to grab in taxes and leaves us a legacy of an accurate guide to the society of the time. Many references are made to London and the numerous villages surrounding it. However, he understands the commercial power of The City and allows it a good deal of autonomy. The office of Mayor of London is created in 1200. The financial strength of The City allows it to grab further concessions from the monarchy.
Many foreign merchants take advantage of the favourable trading conditions of London.
They are not always welcome, with the prosperous Jewish community being expelled in 1290.