A Fairy in the Flat
The short story is first published in The Sketch Magazine (UK) on September 24 in 1924 (No. 1652) as part one in the series Tommy and Tuppence under the title Publicity (together with A Pot of Tea).
In the US there is no publication prior to the one in the short story collection published in 1929.
The short story has also been published under the title It Must Have Been a Fairy in The 20-Story Magazine (UK) in January 1930 (Vol. 16, No. 91).
In book form, the short story is represented in:
in Crime 1929 (American Edition)
Publications in Swedish:
1. Blunts briljanta detektiver 1929 (Dagens Nyheter on December 15)
2. En fe i lägenheten + En kanna te 2015 (In the short story collection Par i brott)