The lost city: images of London 1870-1945 -- Urban Penumbra: the city fringe -- Engine of commerce: the city of London -- Between two cities: Holborn and Strand -- Imperial capital: Westminster and the West End -- City of dreadful night: The East End -- London-over-the-water: South London -- Urban villages: villas and leafy gardens -- Zenith 1918-39: sovereign of cities -- Catastrophe 1940-1945: A city in ruins.