I picture these walls as being <b>constructed</b> by erecting standing stones at regular intervals and 'drystoning' the gaps. How can that be as the result of field clearance? Seems odd to me.
Walling like this makes sense. It adds the option of sub-dividing the field and opening up a new entrance to it by simply 'unfilling' the gap between two standing stones.
What seems odd to me is when they claim this for rows of just 3 or 4 stones. Surely they're either a couple of adjacent gates or a stone row that was incorporated into a wall (or both)
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