Agatha Christie. That in the garden grows Mary (№ 266185)

Poirot handed miss lemon morning correspondence.
- Be so kind, Mademoiselle, answer all those letters of rejection, of course, in the correct form.
Miss lemon quickly ran letters look, simultaneously tagging each respective character. It was her private code, understandable only to her: "slightly flatter", "to slap" "to / meow", "short and sharp" and so on.