Best of luck. I am unfamiliar with the bishop's work (I assume the surname equates to "thaumaturgy"? Funny.), but I wonder how these methods track with the Renaissance magic that pervaded certain orders (that of Ficino, Pico della Mirandola, Campanella, Bruno). It Italy, particularly in the south, there are heavily syncretic practices that transcend any simple distinction between "paganism" and Christianity (needless to say, syncretists don't get invited to many parties, either in the Neopagan or Christian scene). As Giuseppe Barbera noted: "Tutta la cultura cattolica italiana è impregnata di paganesimo. In realtà, l'Italia è stata per secoli cristianamente pagane e paganamente cristiana." (That is, the culture was for a long time Christianly pagan and paganly Christian, which is plainly visible in the artwork.)

Many blessings on your path.
Fra' Lupo