That’s pretty interesting. If this was the way they moved them, would anyone have thought to look for the buried wood frame anchors along a probable path? Would the builders taken time to dig them up later? Finally, were block and tackle rigging in use then? Regardless, seems a pretty novel way to move large behemoths.
It’s much easier to move something on rollers than sliding it across earth, good idea you have there of looking for the traces of the machinery — the “why do it” mystery remains, regardless.