https://www.metv.com/stories/the-beverly-hillbillies-was-in-desperate-need-of-more-writers-as-the-series-progressed

For Henning (https://www.metv.com/stories/producer-paul-henning-almost-worked-himself-to-death), knowing a thing or two about hillbilly history was just as important as other skills listed on a resume.