A Stone Trust friend writes:
I’m enclosing an image of a Granite wall constructed in 1830s along the coast near Dublin. It forms a boundary between the sea and the coastal railway.
You’ll notice that the wall comprises carefully dressed face stones and capping/coping. But randomly, throughout the length to the wall, rough stones are allowed to protrude from the wall at every conceivable height and density. Some are laid in the topmost course right underneath the cappings, which seems to rule out their being some form of “through” stones. There is no pattern to it. (The rear of the wall is mostly integrated into a stone faced embankment.)
Any idea why this is so?
Please send your thoughts, so we can share them with him!