This is the dividing wall which separated the monks part of the church from the lay brothers' part. Apparently you had to have some status to even think of becoming a monk!
The tomb of the physicist Sir David Brewster is close here, surrounded by a low wall. Brewster was famous for his experimental work in optics, especially in the field of polarisation. He developed the subject of the optical properties of the minerals of rocks. His invention of the kaliedoscope was a great commercial success and these are still manufactured in quantity as children's toys!
And here is a flying pig.