Manley P Hall, (who is often referred to, mainly by anti-Masonic writers, as a ‘leading masonic researcher’) wrote in his book The Lost Secrets of Freemasonry (1923—a long time ago):
Recognizing Egypt to have been the cradle of superior culture and most exalted philosophy, and admitting the almost undeniable evid ence that the Egyptian mysteries were the progenitors of modern Freemasonry, it is most sad that a critical dissection of the Egyptian theological system is impeded and rendered almost impossible by the late and incomplete forms of the ancient writings now available on the subject.