Please correct me if I am mistaken, but no references of which I am aware, claim that any chambers off the Descending Passage exist, other than the Subterranean Chamber.
Likewise, for the arches in the Descending Passage as claimed by Osburn and which have been verified by the writer.
Therefore, how much credence can we give to Osburn's record of the Great Pyramid? Of course, if his credentials on these points are questionable, then can we rely on the hieroglyphic assertions?
Personally, do you know of :
1) Any other chambers on the downward incline other than the Subterranean Chamber?
2) Any arches anywhere in the Great Pyramid (true arches)?