Earlier quoted context omitted.
My dad drilled water wells in the US after spending many years working on oil wells overseas. His clients would often hire witchers (water witches, water witchers, well witches - I think the distance from Appalachia to Montana clouded the specific vocabulary). You'd have this very old man dodder around the property with a pair of sticks, and when the sticks magically chose to pull together and cross, that's where you…
It's shocking how many people still give weight to astrology.
Of course, this tells nothing about well-witching, but illustrates that at least some old beliefs aren't as unreasonable as one might think.