Rollers underneath them and slaves tugging and pushing at them were the only means of moving them.
It was useless to simply pull, the only means of moving them were with rollers underneath and slaves tugging and pushing them.
For his great Nympheas murals, Monet himself chose the two ground-level oval rooms as those most likely to recapture the experience of coming across the water lily ponds at his home in Giverny (see page 76).