Spread across a roughly rectangular patch of County Kildare farmland near Feighcullen, a series of low earthen banks and scarps traces out the ghost of a medieval field system that most people would walk straight past without a second glance. Around sixteen rectilinear fields, ranging from about twenty to sixty metres across, are laid out in an orderly grid covering an area approximately 450 metres from northeast to southwest and 350 metres from northwest to southeast. The boundaries are subtle, little more than intermittent banks two to five metres wide and rarely more than half a metre tall, but from the air, particularly on the aerial photographs taken in 1966 and 1967, or on a 2020 satellite image, the cultivation ridges inside the fields become unmistakeable, lined up like faint fingerprints pressed into the soil.

What makes the arrangement more interesting than a simple patch of old farmland is what lies beneath and around it. The field system sits inside, and partly over the southern edge of, what appears to be an older ecclesiastical enclosure, a roughly circular or oval earthwork of the kind commonly associated with early Irish monastic or church sites. Ecclesiastical enclosures of this type, defined by a curving bank or ditch, were often the founding boundary of an early Christian settlement, and the fields here seem to have been laid out without much concern for that earlier boundary, gradually overwriting it. Just to the west lies a possible medieval church site, and the field banks may well be connected to whatever agricultural activity was organised around that church, perhaps representing the managed farmland of a medieval parish or monastic community working ground that had already been sacred for centuries before the first ridge was turned.