The majority of the action in this novel occurs in the greater London area. Most of the specific places mentioned in the narrative are well-known locations within London. The places Billy Prior and Sarah Lumb visit, for instance, are familiar to those living in the British Isles as well as those living outside the country. Westminster Abbey, Hyde Park, the Isle of Dogs and Kew Gardens are popular tourism sites, as is the Whitechapel section of London. Specific neighborhoods or districts within London are mentioned throughout the story as well. Billy Prior lives in Bayswater, for example while Dr. Rivers lives not far from Hampstead Heath.