The view towards Harrow across Roe Green Park from the top of Highfield Avenue.

You tend to think of kerb stones as a bit like an insubstantial, almost conceptual, demarcation between road and pavement. Its only when the pavement is being redone, and they are exhumed and piled up, that you realise how huge and heavy and almost elemental they are. Parts of a Mesolithic henge reduced a more workaday function like fallen gods.