This map plots the settings and references in The Turn of the Screw

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Page 11. " presenting herself, for judgement, at a house in Harley Street "
Harley St
Creative Commons Attribution Share AlikeHarley St - Credit: Loz Pycock

Harley Street, in the City of Westminster, is a prestigious London street owned by the de Walden family. It has long been associated with medical and surgical practices, and the area around Harley Street now has a high concentration of medical facilities, with over 3,000 people employed in related professions.  However in the period of the novella, this tradition was only just starting to take root, with fewer than 20 doctors in the area in 1860.