The Thursday Quiz: Know Your Golden Age?

[dropcap]T[/dropcap]he Golden Age of Detective Fiction reached its apogee between the two world wars, and in 1929 English theologian (and, apparently, amateur pedant) Ronald Knox wrote up a list of Ten Commandments for would-be writers in the genre. For today's quiz, which of the following is/are not among Knox’s requirements? Extra credit for those who can ID the source(s) of the non-Knoxian rules.

1. The story may not contain more than one secret room or passage.
2. A servant must not prove to be the culprit – instead, the villain must be a “decidedly worth-while person.”
3. The detective himself must not be the culprit.
4. There must be no love-interest or other distractions from the business of investigating and solving a crime.
5. The detective’s sidekick (the “Watson”) must be ever so slightly stupider than the average reader
6. The story must be entirely lacking in Chinamen.