The Adventure of the Sinister Stranger

Short story

Original publication:

The short story is first published in The Sketch Magazine on October 22 in 1924 (No. 1656) as part five in the series Tommy and Tuppence under the title
The Case of the Sinister Stranger.

In the US there is no publication prior to the one in the short story collection published in 1929.

Partners in Crime 1929 (American Edition)
Published in the UK later the same year (with a different chapter order): British Edition.

Publications in Swedish:

1. Det blå kuvertet 1929 (Stockholms-Tidningen on February 10)

2. Den mystiske främlingen 1930 (Dagens Nyheter on January 5)