Some soil-marks on the Lincolnshire Wolds, along the prehistoric Bluestone Heath Road: https://www.google.co.uk/maps/@53.3218618,-0.0923862,1005m/data=!3m1!1e3?hl=en …pic.twitter.com/IcUaQheqCd
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Pastscape record for the Neolithic long barrow: http://www.pastscape.org.uk/hob.aspx?hob_id=1071406 …