And it is quite possible that the upper portion of much of the lss of the lower-grounds may have been re-worked in the same way.
Many date back to a very early period, while all of them have been re-worked and re-appropriated over and over again.
Blocks were re-worked upon and proofs sent back with vigour.
The marble shafts of the arcade are re-polished, and the central shaft has also been re-worked to a smooth surface.
It should be worked and re-worked, not simply once or twice, but once or twice after it has been thoroughly worked.