That much is certain. Beyond the bare fact of its existence as a recorded monument, the details remain, for now, largely out of reach. Earthworks is a broad category in Irish archaeology, one that can encompass everything from the raised banks of ancient enclosures to the levelled platforms of long-vanished structures, and the term alone offers only a faint outline of what might actually be visible on the ground. Roo sits in a county whose landscape is layered with centuries of human activity, and an earthwork here could represent almost any period from the prehistoric to the early modern.