I don't know how the ancients could have known the size of the earth. Quote ' then 103.68 inches..... coincidence' but what I do know is the number 103.68 is unique in that it is unlikely to be repeated at Giza.
I have published the fact that a line drawn around the earth at the latitude of Giza, I cant say what exact spot at Giza it passes over but a line of longitude (and anyone can check this) has exactly 60 miles to a degree and if one proceeds either east or west the returns to the same spot the next day then you will have travelled 21,600 miles a number most would recognise 21600 miles has 103,680.000 northern feet (13.2 inches).
Some consideration perhaps as to the coincidence 103.68 should be given.
ps I would like to discuss your findings on Stanton Drew and Brodgar. Same measure one in Saxon feet 13.2 and one in imperial 12 inches same number in both or very close to same number. 338.4 imperial and 338.4 Saxon (372,24 imperial at Stanton drew).
Edited 2 time(s). Last edit at 08-Jan-19 10:53 by molder.