The object may be a bullaun, a term for a stone with one or more cup-shaped hollows, which across Ireland were often associated with saints and attributed with curative or ritual significance. What makes this particular stone quietly odd is not the foot-shaped hollow itself, a fairly common feature of early medieval saint's lore, but the fact that nobody has been able to find it.

St Kevin, the sixth-century monastic founder most closely associated with Glendalough a few kilometres away, left his mark on the landscape of Wicklow in ways both documented and legendary. Stones bearing the impressions of saints' knees, hands, or feet appear at various sites around Ireland and were typically understood as places where a holy figure had knelt or stood in prayer, the rock yielding to their sanctity like soft clay. Whether the Kings Stone at Kilbaylet was genuinely early medieval in origin, a later folk creation, or something repurposed entirely is impossible to say. The name itself is a small puzzle, the royal designation sitting in mild tension with the saintly attribution.

The stone is currently listed as not located, meaning it has not been positively identified or confirmed in the field by any recent survey. It may survive somewhere in the landscape, unrecognised or on private land, or it may have been moved, broken up, or simply lost to time and overgrowth. That ambiguity is, in its own way, part of the object's interest.