It wouldn't be the first time. There's one on the Treshnish Islands, off the west coast of Scotland, that was found resting in a low wet area by a nineteenth century antiquarian. So he moved the whole thing slightly uphill! As a result, we can never research e.g. alignments there. It's a singular warning against tampering with anything you don't understand - people a century from now will probably want to measure aspects of which we haven't yet got a clue, and we can easily knacker it up for them.