Cropmarks appear when buried features, ditches, banks, or walls affect how grass or grain grows overhead, creating patterns of differential colour and height that can only be read at altitude. This particular enclosure has never appeared on any Ordnance Survey historic mapping, which makes it an easy thing to have missed entirely for generations of surveyors and walkers alike.

The site came to attention during the Bruff aerial photographic survey of 1986, when it was catalogued as Bruff 95 and assigned the reference AP 5/2104. The 1840 edition of the Ordnance Survey six-inch map offers one inadvertent clue to its presence, showing two relic watercourses running roughly north to south that truncate the enclosure on its eastern and western sides, suggesting the earthwork predates those channels, or at least existed alongside them before the landscape was reorganised. Later satellite imagery, including a Digital Globe orthoimage taken between 2011 and 2013 and a Google Earth image from September 2019, confirmed the cropmark still shows clearly, with a post-1700 field boundary cutting across its northern edge. A particularly sharp Google Earth image from March 2018 shows the southern and eastern extent of the enclosure defined by relic field boundaries, offering a cleaner outline of what lies below. The monument sits immediately south of a recorded field system and in ground that has since been brought into rough reclaimed pasture.

There is nothing to see at ground level, which is part of what makes this sort of site quietly interesting. The enclosure is not marked on standard maps and there is no physical monument to locate. Visitors curious about the area would do better to examine the georeferenced 1840 Ordnance Survey six-inch mapping available through the OSi, alongside the Google Earth imagery from March 2018, to get a sense of how the buried outline relates to the present-day landscape. The surrounding field patterns and the faint traces of the old watercourses are themselves worth noting as layers of landscape history that have shaped, and in some cases obscured, whatever once stood here.