They show up only from the air, as cropmarks, the faint differential growth patterns that appear in a tillage field when buried boundaries beneath the soil cause the crops above to ripen or colour slightly differently. The result is a ghostly outline of an older landscape, pressed into the earth and legible only at altitude.

Aerial photography carried out in July 2006 recorded the cropmarks of these two sub-rectangular fields, aligned on a north-south axis. The photographs reveal the basic geometry of a small-scale agricultural enclosure, though nothing in the record pins down precisely when the fields were laid out or by whom. Sub-rectangular field systems of this kind can represent a wide range of periods in Irish agriculture, from prehistoric land division through to early medieval farming, and without excavation the date remains open. What the aerial record does confirm is that the boundaries were substantial enough to leave a lasting impression in the soil, even after whatever ditches, banks, or walls once defined them had long since disappeared from the surface.