The Third Floor Flat

 

Original publication:

The short story is first published in Detective Story Magazine (US) on January 5 in 1929 (Vol. 106, No. 6) under the title In the Third Floor Flat with an unsigned illustration.

In the UK the short story is first published in Hutchinson's Adventure & Mystery Story Magazine in 1929 (Vol. 21, No. 1).

 

In book form, the short story is represented in:

1. Three Blind Mice and Other Stories 1950 (American short story collection)

2. Poirot's Early Cases 1974 (British Edition)
    Published in the US later the same year under the title Hercule Poirot's Early Cases.

3. Hercule Poirot's Casebook 1984 (American short story collection)

 

Publications in Swedish:

1. Våningen tre trappor upp 1929 (Stockholms-Tidningen on March 17)

2. På tredje våningen 1929 (Allers Familj-Journal No. 17)

3. Den försvunna portnyckeln 1942 (Göteborgs Handels- och Sjöfartstidning on December 19)

4. Tredje våningen 1989 (In the short story collection En bra kväll för mord. Fem fall för Hercule Poirot)

    Comment: The short story is also published as an audio book: Tredje våningen 2018.