Today's Northern Line began life as two separate railways, the City & South London Railway between the City and Stockwell and the Hampstead Tube between Charing Cross and Golders Green or Highgate. The latter railway, opened in 1907, is the subject of this book. It was the first tube railway to venture into an undeveloped part of London, and quickly fulfilled its developer's dream when suburbs sprang up at Golders Green and the neighbouring Hampstead Garden Suburb.