The Adventure of 'The Western Star' is a short story written by Agatha Christie which was first published in The Sketch in April 1923 in the U.K. The story was published in the U.S. in The Blue Book Magazine in February 1924. In 1924 also, the story appeared as part of the anthology Poirot Investigates.

The Lost Mine is a short story by Agatha Christie which was first published in The Sketch in November 1923 in the U.K. In the U.S., the story was first published in The Blue Book Magazine also in April 1925. The story was gathered and included in the U.S. edition of the collection Poirot Investigates published by Dodd, Mead and Company in the U.S. in 1925. In the U.K., the story was not anthologized until it was included in Poirot's Early Cases in 1974.

The Adventure of the Italian Nobleman is a short story written by Agatha Christie, which was first published in The Sketch in October 1923 in the U.K. The story was published in the U.S. in The Blue Book Magazine in December 1924 as "The Italian Nobleman". In 1924 also, the story appeared as part of the anthology Poirot Investigates.

The Double Clue is a short story written by Agatha Christie, which was first published in The Sketch in December 1923 in the U.K. The story was published in the U.S. in The Blue Book Magazine in August 1925. It was later gathered as part of the anthology Double Sin and Other Stories published in 1961 by Dodd, Mead and Company in the U.S. In the U.K. the story was not anthologised until it was included in Poirot's Early Cases in 1974. It is the first appearance of the recurrent character Countess Vera Rossakoff.

The Case of the Missing Will is a short story by Agatha Christie which was first published in The Sketch in 1923 in the U.K. It the U.S., the story was first published in The Blue Book Magazine in 1925. The story was gathered and included in the collection Poirot Investigates, published by Bodley Head in 1924 in the U,K, and Dodd, Mead and Company in the U.S. in 1925. It is one of the early Poirot stories.

The Million Dollar Bond Robbery is a short story written by Agatha Christie, which was first published in The Sketch in May 1923 in the U.K. The story was published in the U.S. in The Blue Book Magazine in April 1924 as "The Great Bond Robbery. In 1924 also, the story appeared as part of the anthology Poirot Investigates.

The Veiled Lady is a short story by Agatha Christie which was first published in The Sketch in October 1923 in the U.K. In the U.S., the story was first published in The Blue Book Magazine also in March 1925. The story was gathered and included in the U.S. edition of the collection Poirot Investigates published by Dodd, Mead and Company in the U.S. in 1925. In 1946 it appeared as part of the collection Poirot Lends a Hand, now extremely rare. In 1974 the story was included in Poirot's Early Cases.

The Adventure of Johnnie Waverly is a short story by Agatha Christie which was first published in The Sketch in October 1923 in the U.K. It the U.S., the story was first published in The Blue Book Magazine in June 1925. The story was gathered and included in the collection Three Blind Mice and Other Stories, by Dodd, Mead and Company in the U.S. in 1950. In the U.K., the story was not anthologized until it was included in Poirot's Early Cases in 1974.

The King of Clubs is a short story by Agatha Christie which was first published in The Sketch in March 1923 in the U.K. The story was published in the U.S. in The Blue Book Magazine in November 1923. In 1951, the story appeared as part of the anthology The Underdog and Other Stories published in the U.S. In the U.K., the story was anthologized and published as part of Poirot's Early Cases in 1974.

Double Sin is a short story by Agatha Christie which was first published in the Sunday Despatch in September 1928 and in Detective Story Magazine in the U.S. in March 1929 (as "By Road or Rail"). In the U.S., the story was gathered and included in the collection Double Sin and Other Stories, published by Dodd, Mead and Company in the U.S. in 1961. In the U.K., the story was not anthologized until it was included in Poirot's Early Cases in 1974.