My study window looks out over a 10-acre meadow with a small hill on the far side. Under the grass on the hill there’s esker sand and gravel laid down in the last Ice Age. Back in the days when the main forms of transport round here were powered by horses and donkeys people had to be more locally self-sufficient, particularly for heavy items like sand and gravel, and a small quarry was opened up on the west side of the hill.