The Adventure of the Cheap Flat Summary

When Poirot investigates the rental of an unusually cheap apartment, he finds that two spies attempt to rent their apartment to someone with the same name and similar appearance to avoid retribution from the mafia. Captain Hastings finds out from Gerald Parker about an unusually cheap flat rented to Mr and Mrs Robinson in Montagu Mansions near Knightbridge. Mrs Robinson fears that the low price may be an indication that the house is haunted.

Poirot is so interested in the matter that he wants to investigate it on his own. According to the porter of the mansion, Mr and Mrs Robinson lived there for six months. Poirot knows that Mr and Mrs Robinson have just moved in and decides to rent an apartment in the mansion as well.

At night he removes the...