Ken Fisher the former president of the English Library here and myself are working on a project now to get to the bottom of this, literally in many ways. Gordon Kennedy is sending me some more copies of his book over too. There are photos I took in it. I am going in a book by Filip Coppens that is being published too. He came over here a couple of years back and wrote about the pyramids then:
http://www.philipcoppens.com/nap_art12.html