Yes there is something very pleasingly minimalist about the lines. I think things that are just slightly off symmetrical really chime with something in the visual bit of my brain. (I've been making art based on buildings recently. But maybe rock art is the inspriration of the future. hmm)
You're probably right about the farmer's wife. Perhaps he'd been trying to keep it quiet. But once she'd found out he didn't get a moment's peace until it was in little bits in the rockery. You never know.