- The Dowager Duchess' letter in the beginning of A Presumption of Death.
- In The Incredible Elopement of Lord Peter Wimsey, the Magician (aka Lord Peter) draws on all the Greek and Roman literature he remembers for fake incantations.
- In Busman's Honeymoon, Harriet jokes that she wished she'd married Bunter. Peter's response:
"Bride's wedding night confession! Peer's son slays valet and self!"
- In Clouds of Witness, Parker, having kinda maybe fallen half-asleep while waiting for Lord Peter, has what he thinks is a Eureka Moment, prompting him to say aloud, "The glass-blower's cat is bompstable." Naturally, this Waking Non Sequitur comes after Peter arrives so he can tease him about it.