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In The Guardian, the journalist Vanessa Thorpe follows in the footsteps of Franz Hessel, author of the 1929 book Walking in Berlin. Quite remarkably, she contends that "the city that comes to life on Hessel’s pages could be straight out of Cabaret, based on Christopher Isherwood’s novel Goodbye to Berlin" - a book published 10 years later. If anything, Isherwood took inspiration from Hessel rather than the other way round.&#160;