Source: photograph by volunteer in PG archive
A theory was taken up by some of the volunteers which maintained that much terracotta in the 19c had been limewashed to imitate stone. This theory was acted on in the area at the bottom of the steps down to the lawn from the Palm House terrace. Here we can see some of the several plaques which have a design of a barrel and fruit being limewashed by volunteers.
Fortunately the popularity of this idea was short lived.