Stu took me to see this stone after a mooch to the Bamford Moor South Circle.
As Holy mentions, the beautiful deeply weathered grooves on the top and bottom of the stone let you know that this lovely stone was once upright and had been that way for at least a couple of thousand years.
It's possible by tracing the channels to see how deeply the stone was buried.
Stu informs me that the authorities in the Peaks are re-erecting guide stones that were toppled during the second world war to prevent the German invaders from navigating their way across the Peak District. I think given the recent history of this stone being toppled, a good case could be made for its re-erection / ressurection