Agatha Christie,
The Disappearance of Mr. Davenheim
“ He’s up against civilization.""Mon ami," said Poirot, "you make one error. You do not allow for the fact that a man who had decided to make away with another man—or with himself in a figurative sense—might be that rare machine, a man of method. He might bring intelligence, talent, a careful calculation of detail to the task; and then I do not see why he should not be successful in baffling the police force.""But not you, I suppose?" said Japp good-humouredly, winking at me. "He couldn’t baffle you, eh, Monsieur Poirot?" ”
