A circular embanked enclosure, roughly 60 to 65 metres in external diameter, was recorded on the 1839 edition of the Ordnance Survey six-inch map, making that early cartographic effort the primary evidence for its existence. Stand in the same field today after a cereal harvest, and there is nothing to see at ground level. The enclosure has effectively vanished into the soil.

Embanked enclosures of this kind are broadly associated with early medieval settlement or ritual use in Ireland, formed by a raised earthen bank defining a roughly circular space. They are cousins to the more familiar ringfort, though the term covers a range of functions and periods. What makes the Saintleonards example quietly puzzling is how completely it has faded. The 1839 Ordnance Survey mapping was itself a remarkably thorough exercise, undertaken with considerable attention to features visible on the landscape at the time, so the fact that the surveyors recorded it suggests the bank was legible then in a way it simply is not now. The site sits on a gentle west-facing slope, with a north-south stream running approximately 170 metres to the west, a position that would have made practical sense for an enclosed settlement, near water but on slightly elevated, well-drained ground.

What remains is essentially a cartographic ghost, a circle drawn on a map made nearly two centuries ago, pointing to something that once broke the surface of a Wexford field and no longer does.