Hownam Rings rig & furrow - NT 7914 1931
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The camp is surrounded by over 200 acres of rig and furrow, interspersed with field boundaries and enclosures. The rig and furrow is often curved, which is indicative of medieval ox-ploughing.
https://canmore.org.uk/site/93665/hownam-rings
https://canmore.org.uk/site/57990/hownam-rings