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I do know he was using divining rods, which is a superstitious practice that the Church has condemned.

Don't be so hard on yourself.  That's what this forum is for.  I'm sure it's a condemnable practice if one attributes some kind of "superstition" to it, but there are more things under heaven and earth that are dreamt of in the philosophy of "modern science".  There's probably some scientific explanation for how / why this works ... even if we don't know what that is yet.  We see that all the time where, if modern science can't figure out how or why something happens, they dismiss it as fake or fraudulent or superstitious.  I doubt that modern science understand 1% of our physical reality, and probably understand at least 50% wrong or incorrectly.  They do that constantly in the medical field, where the deride some of the medical practices of past generations or past civilizations as stupid ... only to find out that they were onto something.  Those old Farmers' Almanacs made better predictions about the weather (using whatever methods of prognostication they employed) than modern meteorologists.  There's probably some simple farmer out there that can smell the air and thereby accurately predict the weather for days or weeks out, whereas I can't trust "AccuWeather" to be even close more than 2 days out.