This polygon relates to the fossilized shape of former open field / fields radiating from Burghwallis SMV site in SE. An enclosed strip layout with lots of 'S-curves' characteristic of Ridge and Furrow is shown as having been established before the enclosure survey by J Colbeck in 1813. Layout maintained till 1852 first edition map data but successive revisions show that the present open character of the landscape was well established by then 1920s. Previous character types reflect this evidence. Cropmark evidence at SMR 2525/01 for prehistoric activity ?Ring ditches.