Arlington-street is a street in St. James's, in the City of Westminster (London, England).

In London Labour: 

No. 6, Answers to Correspondents  

Ann-street is a street in Islington, in the modern Borough of Islington (London, England).

Cornhill is one of the traditional cities of London. It was part of the city’s “main major east-west thoroughfare that divided the northern half of London from the southern half” (Jenstad). It is believed that Scrooge’s fictional creditor business was in this part of London.

“In honour of its being Christmas Eve, and then ran home to Camden Town as hard as he could pelt” (Dickens). Camden Town is the location of the Cratchit family's home in Charles Dicken's A Christmas Carol. Camden is a district of northwest London, which became an important location at the time of the novella for the development of railways (“Camden Town”). It is thought that 18 Bayham Street is the exact address of the Cratchit’s house in the story, as this was where Dicken's once lived.