Everything you need to understand or teach Clouds of Witness by Dorothy L. Sayers.
The contrast among Lady Mary's three suitors nicely illustrates an important theme in the book concerning the importance of human life. Her official fiance Denis Cathcart is a jaded illustration of the decadence of the old order. He is seeking a marriage of convenience and wishes to marry only in order to support his mistress in a better style. He is the victim, but as his past is unfolded through detective research, he...