“Order” and “Method” were his gods. He had a certain disdain for tangible evidence, such as footprints and cigarette ash, and would maintain that, taken by themselves, they would never enable a detective to solve a problem. Then he would tap his egg-shaped head with absurd complacency, and remark with great satisfaction: “The true work, it is done from within. The little grey cells—remember always the little grey cells, mon ami!”

