8/ Not much later Charles Booth meticulously surveyed the demographics of London to create his famous "Life and Labour of the People in London", the first example of a "poverty map" showing the spatial distribution of poverty and inequality in the city.
https://en.wikipedia.org/wiki/Life_and_Labour_of_the_People_in_London
8/ In 1931 cartography changed forever when technical draughtsman Harry Beck represented the London Underground network as a schematic diagram rather than a geographically correct map.
https://en.wikipedia.org/wiki/Harry_Beck
Beck's iconic style has been copied by transport networks - and others - world wide, with many, many variants.
Over the years we have had many talks at Geomob London about the Tube network, material enough for a thread of its own in the future.