I don't mean to quarrel, and not really pushing a point, but been thinking about witching wells again. I used to be inclined to "believe", untill I saw my sons records.
Their purpose was not to debunk witching, but rather to decide whether they should find a good witcher to help in their business.
For something over 1000 wells (actually seems it was close to 1100), they recorded simply whether they got enough water to consider it a usable well, and whether it was witched or they simply chose a likely looking, easy to get into spot.
They did not do witching, so if witching was done, it was by someone found by the property owner; this would tend to indicate a great variety of witchers.
At the end of their survey, the two methods of deciding where to drill were less than two percentage points apart. (don't recall now which way it leaned--the "lean" seemed insignificant.
It would seem that if even a small percentage of the witchers involved actually brought about a better than random result, it would have produced statistical results significantly in faver of witched wells rather than what you would expect from random choices.
O K, as I say, I am not looking for a debate, but rather ideas on this survey?
Vaughn