Death on the Nile (Hercule Poirot, #18)

by Agatha Christie

But think, think for a moment along the lines that I shall indicate. There are certain points . . . There is the statement of Mademoiselle de Bellefort that someone overheard our conversation that night in the garden at Aswan. There is the statement of Monsieur Tim Allerton as to what he heard and did on the night of the crime. There are Louise Bourget’s significant answers to our questions this morning. There is the fact that Madame Allerton drinks water, that her son drinks whisky and soda and that I drink wine. Add to that the fact of two bottles of nail polish and the proverb I quoted. And finally we come to the crux of the whole business, the fact that the pistol was wrapped up in a cheap handkerchief and a velvet stole and thrown overboard. . . .”