This map plots the settings and references in When the Siren Calls

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Page 136. " moving up Long Acre anyway "
Stanfords on Long Acre
Creative Commons Attribution Share AlikeStanfords on Long Acre - Credit: Derek Harper
  Long Acre is a street near Covent Garden in central London. It starts at St Martin’s Lane and ends at Drury Lane. Once famous for its coach makers, it is now a busy shopping street with many high street chains and Stanfords, one of the oldest and largest map shops in Britain.