Exeter

Exeter is a cathedral city and the county town (capital) of the county of Devon, England. Devon being Agatha Christie's home county, it is not surprising that Exeter is mentioned frequently in her works.

Exeter in the works by Agatha Christie

 * In the novel The Sittaford Mystery there are multiple references to Exeter:
 * Inspector Narracott is based in Exeter and sent to Exhampton to investigate the murder of Captain Trevelyan.
 * Exeter St David's - this actual railway station is mentioned multiple times. The Gardners live 3 minutes from there.
 * Exeter Queen Street - this other actual railway station is also mentioned.
 * Deller's Café - an actual cafe in Christie's time, unfortunately destroyed by bombing in World War 2. Emily Trefusis had tea there with Charles Enderby and were surprised to see Ronald Garfield there with Mrs Gardner.
 * The Gardners lived at “the Laurels”, on Waldon Road, Exeter. The road name is likely fictional.
 * In the novel Sleeping Murder, Jackie Afflick's coach company (Daffodil Coaches, Devon and Dorset Tours) is located in Exeter.
 * In the novel And Then There Were None, General Macarthur had to change trains in Exeter on his way to Soldier Island.