Did you ever know a serious emotion to express itself in a subordinate clause?
~ Clouds of Witness, BBC TV miniseries, 1972, based on Dorothy L. Sayers’ novel Clouds of Witness, a Lord Peter Wimsey mystery. IMBd credits both Sayers and Anthony Stevens as writers, but because the line is used solely to create atmosphere, and Sayers died in 1957, I doubt it was her idea.