No cartographer marked it, no local landmark drew attention to it, and for most of the twentieth century it existed only as a slight irregularity in the pasture. It took an aerial camera to reveal what ground-level observation had missed entirely.

The feature was first identified during a survey conducted from the air over the Bruff area in 1986, recorded as image Bruff 119 in that photographic archive. From above, the outline resolved itself into a sub-circular enclosure, measuring roughly 32 metres on its north-west to south-east axis and 26 metres north-east to south-west, defined by a shallow fosse, that is, a ditched boundary cut into or scraped from the earth rather than built up with stone or timber. The record was compiled by Martin Fitzpatrick and uploaded to the national monuments database in April 2021, drawing on both the 1986 aerial photograph and a Google Earth image from September 2020, which confirmed the feature was still legible in the landscape more than three decades after its discovery. What makes the situation particularly interesting is the company it keeps: a second enclosure sits roughly 20 metres to the south, and a further earthwork lies about 20 metres to the north-west, suggesting this part of Cromwell Hill carries a cluster of related, if as yet inadequately understood, activity.

The monument sits in working pasture, so access would depend on the goodwill of the landowner. The feature occupies the north-east corner of its field, and because it is defined only by a shallow fosse rather than an upstanding bank or wall, it is far more legible from height or at an oblique angle than it would be to someone standing directly beside it. Low winter light or a light dusting of frost can help pick out subtle ground variations of this kind. Visitors with an interest in aerial archaeology might find it worth comparing the OSi orthophotography from the 2005 to 2012 period with the more recent Google Earth imagery to trace how the feature reads across different seasons and conditions.