Pure chance led my friend Hercule Poirot, formerly chief of the Belgian force, to be connected with the Styles Case. His success brought him notoriety, and he decided to devote himself to the solving of problems in crime. Having been wounded on the Somme and invalided out of the Army, I finally took up my quarters with him in London. Since I have a first-hand knowledge of most of his cases, it has been suggested to me that I select some of the most interesting and place them on record. In doing so, I feel that I cannot do better than begin with that strange tangle which aroused such widespread public interest at the time. I refer to the affair at the Victory Ball…