Listening to the radioplay and watching the TV adaptation of Clouds of Witness with Lisa made me really appreciate the actual book all over again. Every detail that she quibbled in the radioplay or TV series had an answer in the book; Sayers really knew what she was about. (Which is not to say that she never dropped a brick, but she made choices in her books for good reasons, and adaptors of her work should pay attention to her intentions there. (I’m looking at you, whoever adapted The Nine Tailors for TV — never mind that you’re blatantly disregarding history by having the Spanish flu occur in the 30s.)
Anyway, the book itself: in this second book of the series, Lord Peter finds his own brother accused of murdering his sister’s fiancé, and has to rush back to England from Paris to help investigate what happened. The book isn’t short of physical peril for Peter: he nearly drowns in a bog, is shot by his sister’s other fiancé, attacked by a farmer, and flies from the US to the UK in a two-person aircraft to hurry back with evidence for Gerald’s trial. He gets to be a hero here for Gerald’s sake, and readers see more of his depth of feeling, sense of responsibility and duty, and of course his wit and brains.
People often think little of mystery books, and consequently of Dorothy L. Sayers, and it’s true there aren’t many mystery novels whose solution turns on the plot of an 18th Century French novel. Still, Sayers ensured there is at least one (and several other books with equally erudite references and plots).