Hercule Poirot met his lifelong friend, Captain Arthur Hastings, and solved the first of his cases to be published, "The Mysterious Affair at Styles". It is clear that Hastings and Poirot are already friends when they meet in Chapter 2 of the novel, as Hastings tells Cynthia that he has not seen him for "some years". Particulars such as the date of 1916 for the case and that Hastings had met Poirot in Belgium, are given in "Curtain: Poirot's Last Case", Chapter 1. After that case, Poirot apparently came to the attention of the British secret service and undertook cases for the
Hercule Poirot and English, Poirot is also fluent in German. Gustave[...] was not a policeman. I have dealt with policemen all my life and I "know". He could pass as a detective to an outsider but not to a man who was a policeman himself. Hercule Poirot was active in the Brussels police force by 1893. Very little mention is made about this part of his life, but in "The Nemean Lion" (1939) Poirot refers to a Belgian case of his in which "a wealthy soap manufacturer[...] poisoned his wife in order to be free to marry his secretary". As Poirot was