"Who told this girl about you, Monsieur Poirot?"
"No one as far as I know. Naturally, she had heard about me, no doubt."
Mrs. Oliver thought that "naturally" was not the word at all. What was natural was that Poirot himself was sure that everyone had always heard of him. Actually large numbers of people would only look at you blankly if the name Hercules Poirot was mentioned, especially the younger generation.
I'm working my way through quite a few mysteries this summer and gaining more insights into the genre and how my stories will fit into it.