
Perhaps at the time of writing, academic orthodoxy prevented French from delving into the mystical areas of research, or perhaps French wasn't really interested in occult magic, I can't say for certain. French does say that we wouldn't "close any doors" with his book, that's true; indeed, one question that I had before reading and that remained after reading is the actual existence of supernatural beings - reputedly the sources of knowledge that alchemists like Dee (as well as Isaac Newton, incidentally) used to "help mankind" as well as garner socio-political influence; though not necessarily wealth.
A good biography and snapshot of England in the 1500's!