A curious intent look came into her eyes. Parker could not place it, but Wimsey recognized it instantly. He had seen it last on the face of a great financier as he took up his pen to sign a contract. Wimsey had been called to witness the signature, and had refused. It was a contract that ruined thousands of people. Incidentally, the financier had been murdered soon after, and Wimsey had declined to investigate the matter, with a sentence from Dumas: "Let pass the justice of God."
(from Unnatural Death, by Dorothy L. Sayers)