The third pyramid is something we have to deal with as I don't feel this train can leave the station until it's done.
It seems to me that there is an assumption Petrie's measure 4153.6 inches 346.13333 feet is the actual base of the pyramid and when I. E. S. Edwards wrote 356.5 feet well that was somehow a misprint.
Edwards 'The Pyramids of Egypt' first published in 1947 then revised in 1961, 1972, 1976, 1980, 1985, 1991, 1993. He had plenty of opertunity to correct a mistake like the base measure for the 3rd pyramid. He did not.
Edwards was 'Keeper of Egyptian Antiquities' at the British museum 1955-1974. He excavated in Egypt and the Sudan. He always took the latest information for example the measures for the Great Pyramid are not Petries but J Cole as they were the lattest at the time.
Petrie gives a clue here when he measures the 3rd pyramid. p.37 'The Pyramids and Temples of Giza' when he states 'At this level then (at this level then) the sides averaged 4153.6 inches'. So what additional information did Edwards have?????.
It is reasonable to expect that just as the Great Pyramid had 3 base measures ie the core casing and socket so also did the 3rd pyramid.
However Petrie had struck on something as his calculation for the height of the pyramid based on the base 4153.6 he gave as 2564 inches. Now look at what happens when the base is divided by height 4153.6 / 2564 = 1.619968799 or 162 half the base Edwards gives 356.5 and 162 Indus feet x 2 = 324 Indus or 356.4 imperial. (see my short essay on duplication of cube last post to David).
324 Indus feet = 356.4 imperial feet. Edwards base 356.5 and his height 218 feet.
Watch what happens with 356.4 x 1.23456789 = 440 exactly or 220 x 2.
Yes David the builders of the megalithic sites in Europe and at Giza shared the same math.
Anyone with good pics of the base of 3rd pyramid please post them.