Being a well driller for nearly 50 years, I have more experience with underground water than most. When I started in business in the early 70's, maybe 25% of wells were witched. By the 2000's maybe 3 in a hundred were witched. I have seen everything under the sun used by witchers to douse for water, from the forked peach branch, plumb bob, brass rods, transparent plastic lines filled with bird seed and one of the funniest was a stark naked Native American that stomped the ground and chanted to the sun god. One witcher even talked to his stick and the stick would talk back to him. To see if witching was real, an Internation conference of engineers and witchers was held in Italy. An underground grid system of water filled pipes was laid in conjunction with the witchers, all agreed that they could follow the course of the water. Ten different pipes that could be either left empty of flooded. Then the piped were covered in 2 feet of soil. A $10,000 reward was offered for anyone who could find and follow the flooded pipe. The reward was never claimed and eventually the land was tilled up and returned to an orchard. Another similar type test area in Spain IIRC is in existence with similar reward and has yet to be claimed. On my property I had 7 different witchers , witch and none found the same area, but all found some water. I went to where no witcher found any sign of water and drilled a 12" diameter well to 72' and it was producing 1,200 gallons per minutes. A side note the naked Native American that stomped the ground and chanted to the gods must have been having a bad day as I drilled in the spot he found, and no water was found. One of the reason many people believe is what I call the favorite Auntie situation. We all know such a sweet person and she witches and has always found water, however in my area you can throw a rock in any direction and drill where it landed and find water. So, when sweet Auntie finds water with her forked stick and a well is drilled and water found then it must work. No engineer or geologist use or believe in them. I have experienced over 200 witched sites with mixed results to say the least.